While I'm not advocating this sort of violence by any means, it is true that if someone you think is dangerous for the country and the world if he is elected is doing well, it's not enough just to not vote for him. You have to work to persuade his supporters, or the wavering voters, to not vote for him either. I suspect this protest will end up achieving the opposite of that, for some of Trump's supporters. The opposition to Trump can't afford to be silent, though.