I've been watching this show, and I still am not sure what I think about it. But here's what goes through my mind as I watch it, almost every episode:

They aren't ANGRY enough. These aliens came to Earth, and their machines pretty much destroyed everything Earth was - and then there was war.. but now everyone is like "Ok, this is the way things are now... oh well. Oh look, my neighbor is one of the aliens that helped destroy my planet. Hi neighbor!"

I mean, yes, this is an exaggeration, but come on.