The only people that regularly say that Israel doesn’t have a right to exist are stirring shit,

I think you mean people with a realistic understanding of history and current reality… That’s definitely stirring shit in this fascist society.

There’s the implication that jews have no right to a homeland of some kind,

Nobody has a right to “homeland” especially when it belongs to someone else and is stolen through genocide.

If you’re saying that no nation has a right to exist, fine, cool

Exactly. Thanks. Go home.