I'm just saying, most Christians (I sincerely hope) don't really believe that God created everything in 6 days, that woman was created from Adam's rib, that Noa built a ship that was big enough and had proper facilities to house a pair of every non-aquatic species on the planet (let's ignore the fact that a pair of a species isn't enough to repopulate it..), etc.. Intelligent people just can't take that sort of thing literally. It's not an excuse to pick and choose which segments to want, it's a way of looking at the whole thing. We should have grown past this sort of thing anyway but I guess we're slow.
I met a lot of Christians, albeit here and not in the US, and none of them had a problem with the theory of evolution. And yes, all of them believed exactly that, as you say, we came to this form "via a constant hostile competitive environment selecting the most successful out of a randomly changing population".
This doesn't stop them from going to church on Sundays though. You can attribute that to most people not really being fanatical about religion. They were brought up in a certain spirit so they go to church; they accept the basic moral values that stem from Christianity but don't take the bible literally. And it's a good thing, too. Taking any religion completely literally is a form of fanaticism. And we all know where that leads.