I am not.
We currently have a big debate here in Germany if violent video games have any negative effect on children, especially now after a school shooting. MW2 with its airport level will certainly not help.
And even without this discussion, I really don't see what this airport level is about except cheap sensationalism. It is certainly not well made enough to support the claim from IW "to show the horrors of terrorism".
Besides that, compared to MW1 the new one is shorter and lacks features. And the gameplay is still just a shooting gallery where you have to walk from gallery to gallery with some explosions on the way.
No, I am not excited.