According to the league of Nations mandate in 1922' Jews could settle anywhere in 'Palestine AKA the Roman name for Israel'. The San Remo conference gave the Jews the same right. The UN confirmed the current validity of the Leagues mandate system in Chapter 80 of the UN charter, including the Mandate for Palestine. This was again confirmed by the International Court in he South West Africa case in the 1960's. Further, UNSC'S resolution 242 did not require Israel to return all the LANs captured in the June 67 war. The Oslo accords of the 1990's allowed Israel to build at will in area 'C' of the West Bank, which is where she has been building. So quite contrary to what you say, Israeli settlements in the WB is absolutely legal according to International Law.
Israel passes law sanctioning force-feeding prisoners (Haaretz)
from the article: Plan to legalize West Bank settlement of Eli paves way for its expansion