Anyone watching the end sequence of that video who goes on to describe it as anti-semitic either does not understand human emotion or is deliberately lying.
Its using an anti-Semitic message to make a point. I understand that fine. But its also a video where a smiling person merrily displays message promoting genocide while the host laughs his ass off. If that doesn't make you the least bit uncomfortable, I'm a little worried about you. And ironically, the "joke" appears to be "look, nobody's doing anything to stop me from saying these horrible things". So when someone comes along and in fact does a wee bit of that, I don't see where he's got a lot of valid ground to get mad about it. Its precisely what he was asking for in the first place.
As far as the WSJ misrepresenting something, that's hardly new for them.