I know how atrocious Iranian mullahs can be. Remember before Beirut happened, the same regime executed thousands of Iranians first, starting at the beginning of the so-called revolution.
For decades, among Iranians in Iran in particular, a mullah supporter is commonly known as "hezbollahi", that says volumes.
The mullahs regime says they've to do what they can to protect their interests, because 85% of muslims in the muslim world are sunni. The rest, 15% are shia. Very uneven match. You can figure out the rest.
I personally like to see both the mullahs Shia regime and the Sunnis, now ISIS eradicated.
Fact is the Mullahs regime, Now, in Iran at least largely tolerates its religious minorities, i.e. does not indiscriminately behead or kill them.
Based on what we've witnessed with ISIS, ISIS certainly is a 1st class savage & absolutely subhuman.
So, your guess is as good as mine, should it come to war. It may just be a matter of survival for some.
The 31st anniversary is kept in my heart and mind. My heartfelt sorrow and condolences to the families.