"Violent outbursts" are not a symptom of Asperger's/autism. This guy is just a jerk (possibly a jerk who is autistic, but if so it's not his autism that caused him to tackle that guy.)
Of course Milo Yiannapoulous is cool with being misinformed about autism, though. He seems pretty comfortable, for an educated person, being misinformed on all sorts of topics. Seems to be his shtick--to put a sheen of educated credibility on misinformation to suck up to people who hate him and get page clicks. He must really loathe himself.
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"Ego non immanis, sed mea immanis telum." ~ Ares, God of War
(Note to Moderators: my warning number is wrong on my profile but apparently can't be fixed so I will note here that it is actually 2, not 3--the warning issued to me on Aug 20 2016 was a mistake but I've been told it can't be removed.)