Normblog offers a description and demonstration of the Azzajew phenomenon.
One Toby Green - whom non-Brits have never heard of - has resigned from the Green Party - something else the non-Brits didn't know existed. His reason? The party has been taken over by Trotskyite antisemites. (Some of them commented on his post). Some of his explanation is too detailed and insider-ish for the rest of us to follow, but the general outlines are very clear, very convincing, and rather worrying. They can't do anything to Israel or the majority of Jews worldwide who support it, but rising antisemitism can't be a good thing.