Questioning Israel's right to exist is antisemitism according to the official definition accepted by the UK.
Via Jewish Chronicle:
Israel is still considered Britain's strongest Middle East ally - with more British people believing this to be the case than last year, a poll has revealed.read more
Fifty-seven per cent of British citizens saw Israel as a leading ally, up from 52 per cent last year.
The online survey, commissioned annually by Bicom - the Israel and Middle East think-tank - investigated the attitudes of more than 2,000 British adults.
It found that more than half (51 per cent) of people do not boycott Israeli goods, up eight per cent from last year's findings. Fifty-six per cent said a boycott hurts both Palestinians and Israelis.
Asked whether hating Israel and questioning its right to exist was antisemitic, 48 per cent believed it was, while 20 per cent believed it was not. But overall, 57 per cent of people said that simply criticising Israel was not antisemitic.
British warmth towards Israel, the survey said, "remains stable" at 19 per cent, while 24 per cent of people felt warmth towards Israelis; this was in comparison to 20 per cent feeling warmth towards Palestinians.