I totally agree. There is no question in my mind Iran is doing all the mucking up in Iraq. One big problem is that it's a Shia government in Iraq, who probably do not favorably view an attack on Iran. This is a situation where there are triple and quadruple agents, i.e. Shia Iranians supporting Sunni attacks on Shias to push Shias closer to Iran.
So hopefully we can get a united front to topple the Iranian regime and it can be done many ways, including fostering a democratic movement, ethnic Arab Iranian separatist movements, and humiliating attacks on their nuclear installations... a series of measures that in total are too much for the current regime to handle. It doesn't have to be us vs them in direct military confrontation, it can and should be framed in a way to isolate the Iranian government from its people.
I don't have a problem with that suggestion at all. I'd prefer and like to see a move in that direction. I do think it may tend to be impractical since the regime in Iran is so represive. We'd probably see a very reactionary move if this were to be tried in ernest. Of course that would serve to undermine the mullah's even more IMO.