Birds of feather flock together. It's not a new thing.
But after all what happened in the last years? I was always shocked when I read this statements of Al-Quaida, Muslim-Brotherhood and Hamas. They promoted the murder of Shiites, the destruction of their graves, mosques and private buildings. They openly wanted to commit genocide and bragged about their plans.
Now they have lost the war in Syria and Iran offers them support.
I think Israel must be very watchfull about their activities in Syria and Lebanon. The leadership and a part of the poplulation of Iran are planning something again what is for them more important than even their own life. This are not normal people.