a, not antisemitic, and no-one claiming it is.

b, Legitimate or not, it exists and is not going away except by anhiliation.
Those in favour of anhilation would certainly be anti-semites.

c,
whether it is the case that accusations of antisemitism are being made against members of the Labour party

They unquestionably are, and all from within the Party.

without any evidence of hostility to Jews or Judaism.


All the accusations that have come to light have been about Jews, not Israel.