A protester, who is an Israeli Jews of Ethiopian origin, is carried by policemen during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest at Rabin Square in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester, who is an Israeli Jews of Ethiopian origin, is detained by policemen during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest at Rabin Square in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

Israeli policemen push protesters, mainly whom are Israeli Jews of Ethiopian origin, during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier during a protest in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester, who is an Israeli Jews of Ethiopian origin, is seen on the floor next to policemen during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest at Rabin Square in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester holds a placard in front of a row of policemen on horses during a demonstration against what protesters, whom are mainly Israeli Jews of Ethiopian origin, say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest at Rabin Square in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. The placard reads: "A violent policeman should be trialled." REUTERS/Baz Ratner 

Protesters, whom are mainly Israeli Jews of Ethiopian origin, run away as a policeman on a horse tries to disperse them during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest at Rabin Square in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

Protesters, whom are mainly Israeli Jews of Ethiopian origin, stand next to a garbage bin they set on fire at Rabin Square during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier at a protest in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester, who is an Israeli Jews of Ethiopian origin, is detained by policemen during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier in a protest in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester, who is an Israeli Jews of Ethiopian origin, blows a whistle next to policemen as they block a main junction in Tel Aviv during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

A protester, who is an Israeli Jews of Ethiopian origin, shouts at a policeman during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier, during a protest in Tel Aviv May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner 

Israeli protesters, Jews of Ethiopian origin, participate in a protest on what they say was police violence against their community in Jerusalem April 30, 2015. The demonstration that began as a peaceful march near national police headquarters in East Jerusalem, grew violent as protesters advanced towards Prime Minister Benjamin Netanyahu's official residence and gathered on a main road close by. The demonstration was called to protest police violence against members of the Ethiopian community after a video clip emerged this week showing two police officers assaulting an Ethiopian army conscript and arresting him. REUTERS/Ronen Zvulun

Israeli protesters, Jews of Ethiopian origin, wave an Israeli flag during a protest on what they say was police violence against their community in Jerusalem April 30, 2015. The demonstration that began as a peaceful march near national police headquarters in East Jerusalem, grew violent as protesters advanced towards Prime Minister Benjamin NetanyahuÕs official residence and gathered on a main road close by. The demonstration was called to protest police violence against members of the Ethiopian community after a video clip emerged this week showing two police officers assaulting an Ethiopian army conscript and arresting him. REUTERS/Ronen Zvulun

Israeli protesters, Jews of Ethiopian origin, participate in a protest on what they say was police violence against their community in Jerusalem April 30, 2015. The demonstration that began as a peaceful march near national police headquarters in East Jerusalem, grew violent as protesters advanced towards Prime Minister Benjamin Netanyahu's official residence and gathered on a main road close by. The demonstration was called to protest police violence against members of the Ethiopian community after a video clip emerged this week showing two police officers assaulting an Ethiopian army conscript and arresting him. REUTERS/Ronen Zvulun

Israeli protesters, Jews of Ethiopian origin, participate in a protest on what they say was police violence against their community in Jerusalem April 30, 2015. The demonstration that began as a peaceful march near national police headquarters in East Jerusalem, grew violent as protesters advanced towards Prime Minister Benjamin Netanyahu's official residence and gathered on a main road close by. The demonstration was called to protest police violence against members of the Ethiopian community after a video clip emerged this week showing two police officers assaulting an Ethiopian army conscript and arresting him. REUTERS/Ronen Zvulun

A protester, who is an Israeli Jews of Ethiopian origin, shouts slogans as he stands next to a giant road sign of a main road in Tel Aviv during a demonstration against what they say is police racism and brutality, after the emergence last week of a video clip that showed policemen shoving and punching a black soldier May 3, 2015. Israeli mounted police charged hundreds of ethnic Ethiopian citizens and fired stun grenades on Saturday to try to clear one of the most violent protests in memory in the heart of Tel Aviv. REUTERS/Baz Ratner