Not sure which planet you are living on but in the real world there’s over a couple million Palestinian refugees living in Arab countries and with the exception of Lebanon have not caused significant problems in the last 50 years.

Also the Arab world and it’s leaders was much more supportive of Palestinians and anti-Israeli in the heyday of Arab secularism, not that I think that religion, theism and/or secularism had much to do with it.

It seems like that’s exactly the point, progressive democrats are very few and not even that progressive except for a few outliers.