Actually, it does not advocate for violence.
It says that oppressed populations have to be willing to go that far in order to enact change.
Oppressors use violence (whether actual or implied threat) to oppress. As Kiljoy pointed out, it is an exception to history when a Rights movement is non-violent.
Women were willing to burn politicians houses down (after nailing the doors shut with while the politicians slept inside) in order to get the right to vote.
If you feel that it targets you, maybe you should take the time to think about what that means when someone says "historically, struggles for equality or rights have had to turn to violence in order to be heard" and you feel threatened.