Dave,
The point I am making is that that argument should be discounted for all the reasons you have just given.

Yes, I grasped your "point" but is spurious.
There was no criminal offence to charge Labour's anti-Semites with, but there is for having sex with under-age children when it actually happens.

Anti-Semitism is a serious problem for the Labour Party, according to the Labour Party, but underage sex parties are not a problem for the Tories because there have not been any.