There's a reason Bush and Obama didn't use the kind of rhetoric Trump does. It wasn't out of weakness or ignorance, ironically. They understood the implications of comparing all Muslims to terrorists. 

No, we probably can't connect all the dots to say this happened because of Trump. But when the most public US figure paints Islam as the enemy it really doesn't take much of an imagination to wonder why things like this happen. Especially with the amount of emboldened bigotry and hate we saw during the campaign. 

This person was clearly mentally unstable. But he probably didn't feel that off base ranting at some Muslim people when the POTUS has said "a complete shutdown of all Muslims entering the US".