It's an obligation ' of Israel to the other nations of the world in accordance with international law'. Peace talks or not Israeli settlements in non-Israeli territories are illegal. Acquisition of territory by war is illegal. Unilateral annexation is illegal. No one has forced Israel to act outside the law.
Police disperse hundreds in brawl in Kafr Manda, northern Israel (Haaretz)
from the article: Barak to Ban: Push Abbas to renew peace talks