I really enjoyed gunning down the civs at the airport, which makes me sound a little psychopathic. It's just like Left 4 Dead, but the zombies are scared of me. Brilliant.
As far as the storyline goes, I think it was alright, but I think that IW were looking for an excuse to have Russia invade the US. I mean, with prior knowledge to the airport incident, you could call the Russian army, the SWAT equivalent, etc, and set up Makarov, meaning that Makarov is branded a terrorist and traitor to the motherland, no invasion happens, everyone lives happily ever after, the end.
But wouldn't that be a really BORING game?
Edit:
They should've done a whole separate spec ops mission set on expanding upon it, so that those who don't care, or might be offended, can leave it, but those who want to know, can. And the intel should have a use: giving you clues for the many, many, many unexplained things within the game; who Raptor is, who the dead man in the panic room is, the tattooed trooper, backstory on Makarov/Shepherd, maybe even plans for world domination from either of them. But they'd have to not give it away - the intel would have to be subtle, to lay on the mystery element.