He said it himself that his comments were antisemitic in nature.Every Palestinian rights defender is very clear about the difference between zionism and the Jewish people.
Every supporter of Israel tries to claim they are the same thing.
One of those is antisemitic and you think its the wrong group.
He also tried to speak for an entire union.
He also overstepped his responsibility and thought making antisemitic political statements was fine.
Anyone else would be fired on the spot. Hopefully he will be gone soon.