I have no idea if people are wanking over it, TBH. All posts I read were "WTF the aliens, but the movie's awesome anyway!", but that might be just my flist.

It's not like Indiana Jones was believable until now!
That's pretty much what I think XD Besides, people would've complained anyway if there were nazis or religious themes again. They tried to be original (er, for Indy films, not in general obviously). Besides, like I said, aliens in general in non-scifi media just make me LOL, so it's fine by me.