Settlers engage in illegal settling of someone elses land. It is Palestinian Land and the Israeli Government understood that quite clearly from the start. Theodor Meron ,legal advisor to the Government at the time told them it breached the explicit provisions of the Fourth Geneva Convention. Settlers need to expect consequences for their actions like any other criminal.
2 Turkish security personnel killed, 24 wounded by Kurdish suicide bomb in eastern Turkey (Reuters)
from the article: Israel Police chief who evacuated West Bank outpost defends use of force