We remember the same history. You are just twisting it to fit your narrative. Laws were changed in the courtroom and Congress, not because we got tired of blasting protesters with water hoses. Your examples are bad because cops did that to black people, not the other way around. We are taking about violence committed by blacks, I.E. looting and destroying property. If we want to go down the rabbit hole, we can do so with Vietnam protestors of all races having the cops attack them.
The overwhelming majority of white people today do not supports racism. What social norm is trying to get changed and how is setting shit on fire and looting going to solve it? Now cops across America will get the message because Target, who had nothing to do with this, lost their stock of Nintendos? It seems counterproductive to the message that black people are not all criminals as they are being portrayed.
How do 4 cops represent police as a whole or show that America is more racist now than in 1960? Did the cops kill this guy because he was resisting arrest and they don’t want to be defied or because the victim was black? The cops are assholes. I personally believe that they treated the victim more harshly based on his skin color. I have a lack of evidence to show that he was murdered because he was black. Neither does anyone else.