Why do you think focusing on Corbyn's anti-semitism will hurt Labour more in the election than focusing on Labour's anti-semitism?
Because that seems to be the argument you're making. BTW, I think there has been plenty of focus on both.
I also think that offering him the opportunity to apologise 4 times and having him refuse to do so each time was far more damaging than dragging up something he said or did in the past. F*cking miles more. Well done, Neil.