This is a myth. The land is most often not "stolen". There are a few cases of outright theft. The Israeli supreme court has taken a hard-line against it. It would be great to be able to focus on these people, criminals, but, while israel is under atttack, these sort of domestic issues are not the priority.
(July 14, 2020) On June 9, 2020, the Supreme Court of Israel, sitting as a High Court of Justice, ruled 8–1 to accept a petition against the constitutionality of the Law on the Regulation of Settlement in Judea and Samaria, 5777-2017 (Feb. 13, 2017). The majority opinion was rendered by Court...
www.loc.gov
What actually happens is settlers will purchase homes in previously jewish communities in the west bank. Or they go to unoccupied open spaces in the west bank with campers... trailers. Then a few more show up, and a few more, and a few more... pretty soon there's a camp. A settlement. It's not "stealing" in the conventional sense. They shouldn't be there, but they're more like vagrants. Transients. In America, specifically in my locality, there is a homeless epidemic. They
do cause problems. There is violence and vandalism. The local law enforcement helps in some ways and permits it in other ways.
I'll see if I can find a picture... OK... good, I found it. Here's what actual an actual settler camp looks like from a local palestinian in a recent video on Youtube.
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There's a youtuber named Salukie, an israeli, who sneaks across the border into the occupied territory documenting the life and stories of Palestinians. He's very friendly to the Palestinians. His tour guide hates the settlers. You can tell by the video. During the video interview, he documents what is alleged to be settler violence against Palestinians. It's vandalism. The Palestinian shows him the settler camp far in the distance.
Here's a link to the video. It's a real world, current, under cover exploration and interview with Palestinians during the current conflict. It puts the accustations about the settlers into their proper context so that it is not exaggerated.