At the risk of going over old ground again, condemning violence will mean violence coming from both the far left and the far right. Being critical of those who feel it is fine to go and punch Richard Spencer in the face doesn't mean you have to support Richard Spencer in any way or anything he stands for. I don't support people who use violent means to try to achieve their aims in almost every case short of something like self defense. The political affiliations of those involved in the violence is largely immaterial.