It seems this meaningless term, which has been used across party lines, is the new dog whistle for racists and Islamapgobes to get on the bandwagon of attacking protests against genocide. I thought it was part of our national myth that we halted a genocidal regime's rampage in Ww2 and we are forever seeking credit for that, but suddenly standing against a genocide is un British. The subtext seems to be that Real Brits support Israel and only immigrants who don't understand Britishness could object to what Israel is doing.