Of course he didn't know it was fake. He didn't bother searching. He isn't a liar. He is a member of a team.
If you go to a sports game and look around you, you can kind of respect the mad fervour that fans often have for their side. It doesn't matter how wrong it is, they bay for their side in any scenario. It's kind of cute, really - but it isn't objectivity and TA is very much gone in that regard. He is a member of a team and he is not an objective human being any more (if he ever was).
And if you doubt that, you can just see what he is personally doing in G&O. Constantly posting of Trump's glorious victories. I read a few. He writes them up with tabloid level exaggeration in the titles.