Yes, and it is still in their manifesto, live today. That is completely incompatible with the SM. In fact, that is precisely the issue that led TM to the WA that is currently on offer. Barnier's slides, linked above, show exactly what tier of EU association is on offer without FoM. Hint: it is a very, very low tier.
So the idea that JC will eliminate FoM and achieve any agreement substantially different than what TM already got is utter pixie dust.
> Antisemitism
The antisemitism stuff is utter hogwash, as in these days it is 95% of the time. Labour says, maybe Israel possibly isn't treating Palestinians in the most ideal way, and maybe annexing large swathes of territory and building settlements could be less than the greatest possible good. Result: they're antisemitic, want the destruction of Israel, and are basically Nazis. Just like in the US. Heaven help anyone who supports BDS. At bare minimum they won't be allowed to visit the free and democratic country of Israel.