For why? Having political views we don't like or agree with?
No, not for having political views we don't like.
For being racist and homophobic.
I'm not giving a pass just because it's in a politics thread, I wouldn't give it a pass in a philosophy thread either, and much to the chagrin of many I've not given it a pass in the football thread where everyone tries to defend it as part of the culture and tradition of the sport.
There are racists and homophobes who support other political parties, and I didn't even read anything specific that said that they were voting Conservative, only that they really didn't like Labour (but it wasn't clear to me whether that is Corbyn, national party, local party, etc).
I banned him for the racism and homophobia. Not for politics, and not even for trolling (I disagreed that they were a troll, that was less obvious to me).