The hardcore leftists will say “Palestine”. Liberals will usually punt on the question, draw some type of moral equivalence to both sides, bash Israel, and then proceed with platitudes.
Smart people will unequivocally say they support Israel
What equivalency? The European refugees sought sanctuary in Palestine and immediately set out to exterminate the inhabitants.
They formed their terror gangs in the early 1920s, killed over 500 British peacekeepers, looted and leveled 300 Arab villages, firebombed the oil refinery at Haifa and murdered Count Bernadotte in the street like a dog after he saved 30,000 European Jews from the Holocaust.
Yeah the Palestinians have never had a country, but they do now in Jordan. They should go live with their people. Israel has been around 70 years now and the Israelis can defend their land. That’s really the only thing that matters: I know you wish Israel gone, but you are trapped in a constant cycle of disappointment. Israel will continue to live and you will continue to suffer because of it, unless you accept it. Either way makes no difference to the reality of what will continue to go on.
....and, of course, the reason the Palestinians never had a country is because there was no such thing as a "Palestinian" people before recent times. They were just Arabs with no particular identity outside of that.
In fact, there is a famous letter by King Abdullah written in the late 40s called "as the Arabs see the Jews", and in it is a long list of Arab grievances, half truths, distortions, and general sophistry. What is most notable, however, is that NOT ONCE does he mention any sort of Palestinian people because, of course, there were none. In fact, through the decade of the fifties and into the sixties, pan Arabism prevailed, and it was only at Arafat's insistence that they started referring to themselves as Palestinians after the six day war.