but if you're going to try to make a parallel with Libya you'll have to show that the Mexican government is engaged in a direct campaign to kill its own citizens.  But the problem in Mexico is the government is proving too weak to deal with heavily-armed drug cartels, which is quite a bit different.  There are a lot of things that can be said to criticise our involvement in Libya, but you are torquing youself waaay out of reality on this one.
To me, a more legitimate series of questions are: what's the end game? how can we say Ghaddafi must go without a mandate from the UN to do that?  what about other regimes in the region with repressive regimes like Syria, Yemen, Saudi Arabia and Iran?  And the beat goes on.
I think we went after Ghaddafi because he looked easy to knock off.  We'll see if that proves true.

Will the Mexican or US capitalists .......ect....ect....ect.