Here is an interview with Gans.
Summarizing ( but interested people should read it) he thinks a Jewish state is justifiable on two grounds ( I think). One is that many Jews benefit from living in a state which is culturally Jewish. He is not knocking Jews who would choose to live elsewhere.
And second, given the long history of antisemitism Jews need a guaranteed refuge.
Okay, that’s fine, I may not agree that a Jewish homeland is the best cure for antisemitism, but I wouldn’t want to argue about it in the era of Russian pogroms, general Western antisemitism, or later, the Nazis. ( The cultural argument is none of my business.). But the 800 lb gorilla in the room is what about the Palestinian right to live in their own homeland? So I was waiting for the interviewer to pin him down on the Nakba and the Palestinian right of return and it didn’t happen, or else I skimmed it too quickly. But he seems to be defending the current demography within the 67 lines, so that probably answers that question. But anyone really interested would probably have to read his books or find a better interviewer.