Multiple reasons can be achieved if the area is destabilize. The best way to do that by having an outpost there. Keep in mind The base mainly in Syria but they claim the attack was on a tower in Jordan where the Jordinian officials claim it was in Syria.

By having a base there they can support local tribs to fight the Syrian Government, allowing Israel to take the golan highest and expanding on that front.

They can support the kurds to control oil rich regions in exchange for oil.

They can play victim if they want to have a war again in the middle east in case of economic needs.

Finally it is a step forward to the great kingdom of Israel that people pretend it is not a plan.