I've mentioned it six times previously on this thread, actually. Pay more attention.
I'm glad you think it is antisemitic, because it forms part of the Houthi slogan.
Another part of the Houthi slogan is 'Death to Israel'.
Do you think that when paired together, Death to Israel and A Curse upon Jews suggests an at least partly antisemitic motivation when attacking Israel, on the part of the Houthis?