The UN Security Council resolution tries to establish whether the settlements are legal or not. Its major reference point is the 1949 4th Geneva Convention, adopted in the aftermath of the Second World War when the Axis powers, particularly the German army, were seizing territories, throwing out the populations that lived there, and bringing in German citizens to live in those areas. But is Israel forcibly throwing the Arab population out of the West Bank? No.
Where the principles of the 4th Geneva Convention are very much relevant and where are they not being applied is in Syria where the army of President Assad and its Iranian and Russian allies are engaged in mass expulsions of the Sunni Arab population. They are also bringing in Shiite population to settle in Syria from Iraq, Pakistan and Afghanistan, altering the demographic balance inside Syria. So the UN is ignoring the real violators of the 4th Geneva Convention who are changing the demographic makeup of the Syrian state to serve the interests of expansionist Iran.