I think there's a good chance that he might be PM.
I think there's an excellent and irrefutable case to be made that he is an antisemite.
Anyway this is the main point:
"Britain’s next prime minister might well be an anti-Semite.” Theodore Dalrymple, an English psychiatrist and distinguished author, began a recent article with that striking speculation. He wasn’t kidding. He was discussing what some in U.K. politics call “the Labour Party’s Jewish problem,” embodied in the person of Jeremy Corbyn, the Labour leader and, conceivably, the next prime minister.
"As Dalrymple explained, we can’t say whether Corbyn’s anti-Semitism is a sincerely held prejudice or merely a matter of electoral calculation — there are far more Muslims than Jews in Britain."