A 70+ year old man was fed up with the interruptions of protesters inside a rally and everyone is to blame? Sounds a lot like the old, "it takes a village" meme.
Are you turning liberal on us, Charles?
I hold Trump himself accountable for this much, i.e., a whole series of stupid, irresponsible statements that encourage, incite, and condone violence: "I could shoot somebody in the middle of Fifth Avenue and not lose any voters." "I could murder someone and not lose any voters." "I'd like to punch that guy in the face." "I'll pay the legal bills if you go after that guy." And then, surprise, one of his rally-goers punches a protester in the face. Which, in turn, led to a predictable situation like last night. Trump is irresponsible with his mouth and shows bad judgment.