But seriously, while ISIS are bad guys and while the left underestimates the threat of Islamic fundamentalism in general, I think that guy in Fort Lauderdale had serious mental issues. If you say "X made me do it" X didn't necessarily make you do it. if it turns out that guy had a real history of being into Islamic fundamentalism then I'll conclude ISIS had a role.
OTOH the guy that killed 50 people in the Orlando nightclub definitely was inspired by ISIS and the left would have done better in the election if they had admitted as much instead of responding to it by saying we need more gun control, as if having more gun control would have prevented such a fanatic.