Are atheist Christian traditionalists more unethical than Christians or atheists by themselves?

A new trend among western traditionalists is to totally drop the argument over whether God exists or not, and instead concede that point right from the start. But they will still argue for an adherence to western Euro-centric Christian values. Many of them cite Nietzsche as the inspiration for being atheist while dually calling for an adherence to western Christian values. That's a strange person to draw inspiration from since Nietzsche would have wholeheartedly rejected such a notion. Nietzsche believed that it was unethical to stick to outdated Christian values if you are not actually a believer of the Christian God. He believed our society could never progress if we cling to Christian values. 

The question here is, are these atheistic Euro-centric western Christian idealists actually more unethical than any fundamental Christian who does believe, or progressive atheists who supposedly reject Christian values as outdated? Or are these western traditionalists just indicative of the fact that all of western society still sees the world through Christian glasses? 

If you ask me, nationalist values, and socialist values are all outdated western values that most western atheists adhere to in some manner. As far as I'm concerned, most western atheists embrace Christian values in some manner and are sickened by the illness that Nietzsche described. They are mostly just pseudo-Christians in some manner. Instead of arguing for actual progressive policies, they all argue for  institutionalised Christian values. 

Unless we reject outdated Christian values, we may as well just go back to being a Christian based society.