Just to be clear, asking people to confirm they agree to Israel’s right to exist is not the same as pledging loyalty. I don’t know if it’s a translation error or a deliberate attempt to make the point seem worse.
It’s radical to me that someone things tying people’s naturalisation to a foreign policy position is a good idea, is seems a pretty shitty one, but they aren’t asking for a blood oath.
I think that’s part of the joke too. Like the whole comic has been written out of order due to race conditions; rather than just the father represents race conditions.
It’s one degree of humour too far though, if that’s the case, doesn’t really land.