Israeli settlers need to give back the land they stole.
Imagine what a court in your country would decide in this case:
A man breaks into a house, kills some of the residents, and locks the rest in the basement. He then lives there and raises a family in this house. Decades later, his children still live there, and there are still prisoners in the basement, and they are routinely abused. The children obviously know all this.
Would the court expel the children from the house and give it back to the original owners or their descendants?
Would the court find the children guilty of crimes?