> if they thrash shit and take over rallies, maybe cops had a reason to shoot? Note - I know there was no reason in at least some cases. What does this mean?

> if they thrash shit and take over rallies, maybe cops had a reason to shoot? Note - I know there was no reason in at least some cases. What does this mean? What is "thrashing shit and taking over rallies"? Under what circumstances do you think it's acceptable for police to shoot citizens?