I strongly disagree with using violence, for a number of reasons, but if I did believe in violence I wouldn't find this essay convincing. Hancox-Li argues that we should judge actions on their effectiveness, and agrees left-wing violence can be effective, naming Mangione and Robinson as examples.
Liberal Currents"Their actions ensured that they struggled to achieve sympathetic media coverage outside of a few left-wing outlets, struggled to attract material or legal support (the ACLU, for instance, refused to touch the case), and failed to achieve positive virality in the larger culture."