> Most people wouldn't accept a new country being made over their heads within their land. Jewish people had largely not been there since Roman times.

There were plenty of Jews living on the land by the time of Israeli independence, land which had largely been acquired by purchases from Arab landowners.

> Would you accept a country being founded in yours for, say, the Roma? I highly doubt it.

Palestine was never a country prior to Israeli independence so that's probably not a realistic comparison either.