Re: Which country would be the biggest loser if Iran regime falls?
Well, Iraq never was a clerical regime.
Afghanistan was. And it is good for Afghans and others that it is not at this moment.
If however you are talking about American invasions then they should obviously be opposed, if such invasions are illegal and unjustifiable. The invasion of Iraq was illegal and uncalled for. And same would be said about Iran invasion. This invasion would be unjustified and illegal.
It is obviously better for the change to come from people themselves, instead of imposed by foreign powers.