To me, "it didn't look like any attempt at humour" suggests pretty blatantly that he's saying that, basically, Bennett was endorsing the genuine usage of such a gag. If that comment was intended to be a genuine gag, rather than a "look, wouldn't this be a stupid gag", then, yes, it would make Bennett an Islamophobe\xenophobe\racist.
To me, it looked like someone saying that they could tell Bennett was endorsing a viewpoint of the nature named above (CBA typing it out again). Which, frankly, they can't. He was, in fact, taking the piss out of it. I know the lad reasonably well, and there's no way in a million years he's that way inclined. If anyone tries to imply that he is, then I'll say they're talking bull&$£%.