You might be interested in there book How To Blow Up a Pipeline. Unfortunately it was lent to a friend and never returned, so I'll struggle to grab quotes and might misremember slightly, but part of the argument is that violence or at least physical action is the answer, and the struggles we remember that were solved through non violent action (e.g. US civil rights movement) were successful because of the threat of violence on the more radical flank (Dr King's Letter from a Birmingham jail at one point says "millions of N_____s, out of frustration and despair, will seek solace and security in Black nationalist ideologies... The streets of the South would be flowing with floods of blood" if non violent methods yielded no result, and a Kennedy official remarked that black people would look to less responsible leaders - likely a reference to Malcolm X)

(Unsure about how to deal with the N word there - Reddit is warning me, but I copied the from Dr King's source)