Personally, I'm in between atheism and Christianity. I feel that Christianity has some errors, but what defines any religion is its goal, its foundation, and everything in between. I still believe a creator exists, but even the story given by God looks like it has some wrongs. Maybe that's just God keeping truths away and surprising us in heaven. And the extremist you posted in the first video, he isn't Christian. If he is; was; a Christian, he would not show anger, violence, or rage towards his equals. God has taught us to be loving to everyone, and it will come back tenfold.
And Atheism is possible, I must say. I've said that Christianity and Evolution are in fact possible in the same world. Say God gave birth to our universe. Then, say God let the scientific process happen as it did, Our Sun, Earth, and eventually life. I believe that Adam and Eve could just be a long time after the birth of our universe, perhaps somewhere in just a field named: The Garden of Eden. I believe the Exodus happened, and most events in the Bible. I feel that maybe Christianity needs altering, but it is possible, just that maybe God wants to hide facts from us, and let us believe, he wants us to figure it out for our own, and there is no wrong answer to him, for as it is said, he will always forgive.