> Are we supplying arms to groups?
Yes. The US supports the monarchy, the Kurds and MeK. The CIA was revealed to have armed MeK (despite designation) and my guess is that they do with the Kurds too. The CIA also talks to the Balochi groups as well although I don't know how organized or armed they are.
Needless to say, "regime change" would in reality mean civil war like Syria or collapse like Libya.
Or Irak.
The list of exemple is long enough, no need to add Iran.
We already had ISIS thanks to the mess in Irak and Libya.
The US has spent a lot of time and money on MEK but I don't think they are very effective. Or will be very effective. My understanding is the leader of MEK has n't been seen in years(is probably dead), and MEK members are only allowed to marry other MEK members, so the number of MEK members is way down from their 80s highpoint, and it's not getting better.