As an ignorant northerner, I don't understand why references to north London and the phrase "stab Britain in the back" are seen as anti-semitic or racist. All of north London isn't a Jewish sector, is it?
Gove was said to have stabbed Boris in the back before May became leader. Isn't it a fairly commonly used expression when you've spoiled something (in that instance Boris's chance of becoming Tory leader)?
Please note I'm not defending anyone or anything in this post, just asking for explanations.