I'd blame Trump's ilk for that too. If you vilify a group (gays in the Orlando case) long enough some unhinged asshat will decide he's taking action for the greater good.
Somehow I don't think it was Trump vilifying gays (which he has not done, BTW) that pushed a Muslim shouting "Allah Akbar!" to gun down gays in Orlando. Perhaps you're unaware of the standard treatment Muslims visit upon gays in places where Islam is the dominant religion? And I don't think it was Trump that pushed a pair of Muslims to gun down their co-workers at a holiday party in San Bernadino. And so on and so forth.
But hey, go ahead and blame Trump for stubbing your toe in the dark last night, or for the flat tire you got last year, or for the bird shitting on your windshield right after you washed your car. He's obviously the root of all evil and must be blamed for anything and everything you don't like. You look like a goddamned uninformed fool for doing so, but please, by all means, exercise your right to broadcast that fact to the world. It does wonders for your argument.