Right now, it should belong to Israel, because Israel is strong enough to hold it. Or to anyone strong enough to take it away. The Golan, or the Golan Heights as it is more commonly referred to, has been a land of war for countless centuries.
In order to fully understand who should have full administration over the Golan, we must take into account the full history of the region, and weigh any possible dangers to the parties concerned. And we must also ascertain the fact that war has it’s gains and losses. In doing so, we must research the oldest known text on the matter, and to my knowledge, the Holy Bible is the most authorative text. Not the Quran.