Another one-sided, simple-minded article from pro-palestinian G&M.
This article claims that : "Most countries consider settlements illegal and an obstacle to Israeli-Palestinian peace"...."Most countries" as UNESCO vote demonstrated, also deny historical facts, like the fact that the second temple in Jerusalem was built by Jews and destroyed by Romans, and instead choose to believe alternative history. One that claims that the entire thing was build by Arabs,who did not even appear on that land until about 600 years later. 

As for illegality, that's another red-herring that "most countries" derive from barrage of biased resolutions from UN ( which is mostly now run by 57 countries in Organization for Islamic Cooperation) . In real world Palestinian claim of " illegality" would not stand up in any court outside of UN. Even the generally pro-Arab French court in 2013, dismissed that Palestinian claim,  and ruled that Israel has the right to build anything they like on public land in WB.