Can't return Sheba Farms because it commands high ground over Israeli lands. Take a look at a geographical countour map. The fact is the land's nationality is up for grabs because of the border disputes and depending upon which laws; civil or laws of war you apply, you arrive at a different result. Israeli is applying the Law of Necessity to resolve the ownership.
27 injured in fire, explosion at former air raid shelter in Hamburg, Germany (DPA)
from the article: Mossad killing of terror chiefs has little impact on Israel-Hamas war