However, though they can vote that the settlements are legal and necessary, their vote cannot affect land outside of their sovereign borders. Israel can also vote to override international law, but the vote is meaningless. If the US tried to change Canada's capital by American referendum, the attempt wouldn't be sillier.
Netanyahu condemns West Bank arson attack, calling it 'terror' (Haaretz)
from the article: Bill requiring referendum on ceding land passes first Knesset reading