
This doesn't read exactly friendly or sympathetic to the Jewish refugees other than it gives them a nation to be deported to. This doesn't exactly read like a Jewish diaspora lead document. Seems like a "modest proposal" document by an anti-refugee person that isn't a complete POS for their times but the idea was.
I found this write up.
https://bigthink.com/strange-maps/ten-jewish-homelands-outside-palestine/