Israeli settlers are arrested and charged all the time.
The establishment of Israel by Britain, after WWII, when Jews had nowhere to go and were being turned away at various shores around the world, including US shores. Are attacks against Israel justified for the simple fact that Israel exists?
Yes, for a variety of reasons the borders of Israel have expanded. I don't know enough about the details to comment, but I also find it hard to believe that the border of Israel plays any relevant role in the terrorism against Israel.