Israel has already demonized Hamas to the point that Hamas has nothing to lose by playing games now that expectations in Israel are high. What will Israelis do? Criticize Hamas? Curse Hamas? They do that anyway. Hamas should use the opportunity to it's fullest. If the deal falls apart, so what? It is a win for Hamas as long as the issue remains contentious in Israel.
Yemen's Houthi rebels commit to peace plan in letter to UN chief, BBC reports (Haaretz)
from the article: Report: Israel, Hamas meet on final Shalit swap details