I think the majority of those are kids with no real political backbone or moral fiber, just looking to cause mayhem because the man is bad and this is their moment to be revolutionaries on twitter and instagram.
A significant number sure, that is not up for debate. However, I think you're mis-characterizing the frustration of a whole lot of Americans who simply have had enough. Enough with the notion of a country as idealistic as this, policing its own citizens in a fashion resembling China or Russia than it does any 1st world country.
What is the real end game here?
For the actual protesters? Police reform.
What kind of legal reform would change what we have now?
*More stringent hiring standards
*Longer and more rigorous basic training
*Continuous in-service training (conflict resolution training, de-escalation tactics, combatives etc.)
*Significantly better pay in accordance with all these other directives
*Mandated body-cam usage (ideally federally set)
*Mandatory citizen review boards
*Felony charges for body-cam tampering (ideally federally set)
*Funding (at least partially) police misconduct settlements directly out of police pensions rather than city coffers
*Anonymous whistleblower protection (ideally federally set)
*Legislating the removal of unfair police protections imposed by the unions (includes getting rid of qualified immunity)
*Mandating special prosecutors for police misconduct cases (will ideally limit legal bias)
*Incentivizing community hiring
*Decentivizing quota-based policing (instead promoting community engagement performance goals, spotless disciplinary records etc)
Among other things...