There's a moral difference between deposing a wicked tyrant and attempting to install a democracy using a pretext and overthrowing a democratic government and imposing a dictator.
well - yes and no
from a morale pov i agree - destroying a dictatorship is allways good.
But - why had the usa all the time from 1880 til today support so many brutal dictatorships (if it suited them) but fight democratic nations (like chile) if not?
i am no fan of saddam hussein, but it is a fact that the us government lied to the world, cheated and createt false facts. So the usa attacked an "innocent" nation for personell things (most accepted is, that Bush junior wanted to beat Hussein for his try to kill his father and also, because of the chance to get the oil under control)
This created a situation nobody belive the usa anymore... maybe ultra-die-hard-rightwinger us people belive something the us government tells in international things, but the rest of the world just think "the liars"...
this could be irrelevant, but sadly the chinese expand, a nation that lack any democratic or human sense... (from a european pov).. so the stupidity and the moral downfall of the american governemnt elliminated the us influence in world politics... that is a problem, but also (again from a non-us-pov) good... cause to long the usa dominated the world and tried to play a game that costed the others more as they gained.
it isn´t forgotten that the hypris of us economy caused the 2008 crisis
also, if you look to the us economy, it don´t look good. the crash will come, maybe in 3 years, or 10 or 15, but the signs are on the wall.
China - and with some delay india will take over....
the iran was like chile just another "sozialist"-nation the american industry decided to take over... like so many other nations in central america.
So - the interest of iran to get the nukes - as evil and wrong it is - is logical and "right", cause if the usa ignore international laws why should the iranians care?