Democracy is not easy. It is hard. It is far easier to follow rules and stay out of trouble in a society than to actually live a life of freedom and moral conscience.
There have been many dictatorships the USA has allied with in the past. That does not make them right.
So, for those in the USA that would see Egypt's revolution as a 'mistake,' in actuality it is not for us to say. If intervention was to procedure in any burgeoning democracy anywhere in the world it would be out of our own fears and not that of the people seeking freedom of oppression.
