Anyone familiar with his radio show would know that he has a running joke about pitching a TV show called 'Monkeys Dressed as Famous People'. I'm guessing this tweet was along these lines. I don't believe he would have even considered the potentially racist connotations and he took the thing down when it was pointed out to him. Stupid, yes, deserving of a sacking, probably, but deliberately racist, I don't think so.
You're trying to defend the indefensible.
He's lied too.
Says he didn't know about their baby, but captions the picture "royal baby leaves hospital".
Pathetic, racist idiot.