Who would benefit from it? Not the peaceful protesters. Violence would sabotage undermine vitiate the whole point of the protests.
The left? How would they benefit when they are always protesting the vicious vile evil that donjohnchump promulgates propagates creates? That would be counterproductive and self-defeating. The left does not engage in that purposely purposefully knowingly. That is not their cuppa tea.
So that leaves donjohnchump. He would benefit from violence during peaceful protests most of all. It gives him a reason to BIBLE PROP A PHOTO OP and show how he took control and quelled the violence when in fact he is the reason for it and the only one benefitting from it and the only one enjoying it completely.
Now if logic hurts your head too much don't worry about it. Y'all never employ it anyway. Why start now?