Guantanamo has some similarities with Gaza. Technically part of Cuba, Cuba cut off its power and water long ago. It's about a third the size of Gaza, at 45 sq. mi. The US dealt with several comparable situations in the 1990s, at Waco, TX, Ruby Ridge, ID, and Jordan, MT. Seems no reason the US should not have cut off power and water. Kinder than what later happened in most cases. There also was the MOVE incident in Philadelphia. Civilians in such cases can be viewed as hostages, and hostage situations always lead to difficult decisions. Of course, the majority of Gaza voted Hamas in. In providing cover for Hamas, some NGOs in a sense also have been taken hostage. From the Hamas p.o.v., denying Israeli rule, certainly cutting off war materiel -- electricity -- is justified. The US cut off oil and steel to Japan before WWII.
Second rocket fired from Gaza explodes inside Strip (Haaretz)
from the article: A very bad year for humanity