So I see a lot of Christians questioning the rationale behind what Atheists believe, where is the Christinan?

Be glad that the Christians are asking the questions in here and giving an opportunity for others to answer. I was talking to a nursing student the other day and she was positively shocked that I "believe in evolution". The whole Christian mindset is so ingrained in our society that many of them practically ume that everyone else is a Christian and a creationist. It's so sad and bizarre.