Iranians are civilized. ISIS is like something pure evil out of Star Wars. The civilized world is going to have to unite to disintegrate ISIS....and that’ll have to include a lot of people we’re not supposed to like.
Iranians have mostly supported the Kurds in Iraqi Kurdistan against Arabs during wars - Iran-Iraq war is another example. Iraqi Kurds used to cross the border into Iran to get medical treatment too. Their interests dictate it, even as Kurds are sunnis. But an interesting point is during iran-iraq war the shia arabs in Iran fought on Iran’s side whereas shia arabs in Iraq fought on Iraq’s.