No he's trying to do one of two things (maybe both):
Close the Pandora's Box of violence that his side opened
Pre-emptively condemn the inevitable violent backlash from the right caused by that Pandora's Box being opened (because nothing the left does will ever be "harmful actions deserving of such retribution", including the violent acts that caused the Box to be opened in the first place).
No he's trying to do one of two things (maybe both):
yeah that too. The shills always tell us not to use the war tactics that they themselves are using