There is no place in this game for antisemitism. The Green Party must Do the Right Thing™ and immediately dissolve!
Repeal the dumb laws preventing that from being possible then.
Dissolving the Green Party could be theoretically possible, but it'd require yet another invasion or PMing a lot of inactive zombies. It may also require an amendment to the Census Act. But it's not really a high priority.
Remember, mergers of parties were illegal until they were not. It's not like
1184AZ v. Peebs considered party mergers or changes to voter registration unconstitutional.
I think the party will just exist until the zombies deregister. Just like what happened to PUP and what not. And I don't see anything wrong with that other than making things mildly more annoying for Peebs.