So basically it was just that strict, eh, personal policy of his to stay away from politics that bit him. What many who claim to be apolitical keep failing to see is that just about everything you do, and say in a public setting, has political implications. Some very minor, others far less so, but they're there and the more public the setting and more notable the channel used, the greater the, real or perceived, implications, so you should be aware of them and when you do make a statement, make it with intent.
Was far more willing to give the guy the benefit of the doubt before, but when I see stuff like that, wanting to just stay away from politics, and even specifically saying he left England just so he won't keep hearing of Brexit, when that's one of the biggest and worst things happening in Europe in decades, and it would even affect him and those he cared for directly... Yeah, definitely can't be bothered to care about such a person either.
(That said, the doxxing and calling his parents as home is damn low and in no way justified.)