Why is Iran sending money, weapons, and troops to keep Assad in power?

The Iran Nuclear Deal just bolstered the economy of the Islamic Republic, providing it with an extra whopping $100 billion.

Apparently, NATO allies believe, although the idea defies logic, that the nuclear deal with Iran will discourage the mullahs in Tehran from attacking Israel.

Prime Minister Netanyahu sent condolences to the families of the fallen Israeli soldiers and holds Lebanon and Syria responsible for the deadly Hezbollah attack.