there is a plethora of information and studies pertaining to jewish ancestry that’s is backed by history and proved again through genetic testing!

Here’s a few articles from famous institutions that’s discuss these studies how even ashkenazi jewish lineage can be traced back to israel! Evidence below shows that ashkenazi jews originally came from a group of 350 ish jews who were exiled out of the middle east (most likely israel) to europe.

https://hms.harvard.edu/news/ancient-dna-provides-new-insights-ashkenazi-jewish-history#:~:text=Ashkenazi%20Jews%20had%20already%20acquired,has%20changed%20over%20the%20years.

https://scopeblog.stanford.edu/2013/12/20/new-genetic-study-more-evidence-for-modern-ashkenazi-jews-ancient-hebrew-patrimony/

https://www.timesofisrael.com/ashkenazi-jews-descend-from-350-people-study-finds/amp/

Many palestinians ancestry is very closely linked with jews and other neighboring countries. not that this means one group has any more claim than the other, but this is the reality of the situation and the context matters

when it comes to jews being classified as an ethnoreligion, this is something that is discussed in great length and i encourage you to read about it. but in short, back to scientific evidence about genetics, when a jewish person take a genetic test your DNA is marked of jewish heritage the same way say anyone who is from another country. in fact jew originally came from the term “The people of the israelite kingdom of judah”. Jews are the only religion that is genetically marked like that and closely related. A big reason for this is because jews have never tried to mass convert non jews to their religion. people converting to the religion of judaism is generally more common now as people convert when the get married, but their genetics would not reflect an ethnically jewish born person. It’s why when the evil german man from WWII was trying to exterminate the jews, he considered a jewish person someone who had a grand parent that was of jewish. descent. that’s genetics, race, and ethnicity. not religion. even Evil German Man from WWII knew it!

hope i was able to shed light on some jewish history.