Don’t assume those who break the law or confront police are agents provocateurs. A lot of people have good reason to be angry. Not everyone is resigned to legalistic pacifism; some people still remember how to stand up for themselves. Police violence isn’t just meant to provoke us, it’s meant to hurt and scare us into inaction. In this context, self-defense is essential.
Assuming that those at the front of clashes with the authorities are somehow in league with the authorities is not only illogical—it delegitimizes the spirit it takes to challenge the status quo, and dismisses the courage of those who are prepared to do so. This allegation is typical of privileged people who have been taught to trust the authorities and fear everyone who disobeys them.
Crimethinc - Dear Occupiers: A letter from Anarchists