Iran is certainly an enemy of ours. They do fund terrorists and they have killed Americans by proxy. So permanently reducing their power isn't the worst thing in the world.
I would prefer that it would be impossible for Iran to acquire a nuclear weapon. I'm not informed enough to understand if their program is actually peaceful or not, but they should just stick to oil.
The Iranian people would likely be better off if the ayatollahs were usurped. I say this because Persians are generally better behaved than Arabs and the country is firmly Shiite, so it might not be an Iraq/Lybia/Egypt situation.
All of this goes out the window if:
- The US commits direct military forces
- the strikes do not permanently degrade Iran's power
We already tried that once. They ended up getting so mad at our puppet government that they revolted and became a weird theocracy-republic hybrid.
We usurped a democratically-elected socialist who was presiding over the Persian-chicks-in-bikinis-on-beaches country everyone dreams about on Twitter. Not exactly the same thing as usurping a burqa regime.