It's a regional power that funds militias and paramilitaries in half the middle east, which uses those paramilitary organizations to exert control and influence over their neighbors and occasionally to assassinate political opposition (e.g. in Lebanon, Iraq), and to prop up the likes of Assad (Hezbollah got involved in the civil war on the Assad side, and in one instance laid siege to and starved out a village) and threaten Iraq, Egypt, Saudi Arabia, etc.

Israel is part of the equation but Middle Eastern politics is more complex than that.