1,
You are basing your comment on a fallacy. I am sure neither UJM nor hakatan are fans of Madmani. But not everything thing is about zionism. And, while almost every time time you hear antizionism by those that are not bnei torah or actual bnei yisroel it is also antisemitism, there is clearly a difference between the two. And I haven’t seen any endorsement by any of teh chasidim of Madmani. But he may unfortunately win the race for Mayor. And antisemites like him can be vindictive.
And sometime people have to keep lines open.
I saw nothing in any of their posts (UJM or Hakatan) (and show me where, if I am wrong) supporting Mamzerani.
.