Stupid comments from Uli. It's very unfortunate that people attack Ozil for his performances, justly or not, because it allows him deflect from the real problem.
And the real problem is that he did this publicity stunt for Erdogan. Even if we assume he's a complete moron, which isn't hard to believe, he has a PR team. He could have issued an immediate apology along the lines of "I didn't realise it would become political", "I couldn't say no to photo", "I am dumb, I don't know any better." But he didn't. And the fact that he didn't, plus the timing (before the elections in Turkey), plus the "to my president" t-shirt (I know it was the other idiot, but they were there together) means that he knew very well what he was doing and wanted to help Erdogan.