Most UK ‘antisemitism’ is aimed at Israel and the palestine issue, and many would argue is not antisemitism and such a word is used as a cheap tactic.
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You gave up the game with that gem, I am afraid.
I get it: Brits are not anti-Semitic, just rabidly anti-Zionist . . . Oh, and pro-Palestinian (read pro-Muslim).
Actually most Brits couldnt care less about the Isr vs Pal issue. Most are sick of it after decades of it every night on the TV news.