There is a "pari passu" of "adverse possession" of lands in the West Bank this would apply to both Jewish settlers and Palestinians -- this was a ruling of the Israel Supreme Court in 2012 barring adverse possession claims to both parties.

Without seeing the chain of title of the land's documented ownership who knows?

After 50 years of "belligerent occupation [look that term up if you are so interested in international law]", and belligerent negotiations, what do you expect?

This hasn't been to the Courts yet and seems more political posturing. Maybe, Abbas delivered his latest demand list and this is just a slap in the face? Neither side is really seeking a negotiated settlement ...