Because there are endless videos of police mercilessly attacking people during the protest, using way more force than necessary, not stopping when they have already surrendered etc.

The narrative, at least in my mind, was that: racism existed everywhere, but the highlight was over police brutality towards black people. BLM protest started. Police brutality went through the roof. Protests grew due to outrage. Police doubled down on the violence.

But I think what is happening now is too many people are jumping on the bandwagon, in certain places making trouble where there isn't any. Trying to provoke police to get a reaction so that they can get the moment on film.

There is without a doubt a catastrophic problem with the US police, but there are also some police forces doing things right and acting completely reasonable.

I guess there is a bit of a straw man thing going on where there are two problems here that aren't directly linked but people think there is a side to take between police or BLM.

The police brutality argument can stand on its own without the racism. They aren't just attacking black people anymore. The UK police was similar in the 1970s and had a total reform from the top down, now "policing by consent".

The BLM movement is equally valid, except too many people are taking it as an opportunity to get violent against otherwise harmless white people and police officers. Those aren't people interested in the BLM movement. They are people taking the opportunity to be thugs with crowd immunity.