Mediator Qatar is “cautiously optimistic” after negotiations to reach a ceasefire in the Gaza war resumed in Doha on Tuesday, just as a top UN figure said Israel using hunger as a tactic in the conflict could constitute war crimes. Israel has been bombarding the Palestinian coastal strip since October 7 when militants from the Islamist group Hamas, which controls Gaza, and other extremist groups killed over 1,200 people inside Israel in an unprecedented terrorist attack. The Jewish state’s reaction and attempt to root out Hamas has killed more than 31,819 people since the beginning of the war,…