Morality and religion

Early in my reconsideration of Christianity I came across the concept of morality as a construct of a religious belief, and I began to wonder if our morality really is the work of our religion. There are several ways to look at this, but the most easy I can consider right now is the issue of genocide. It is fascinating that genocide was repeatedly commanded by God in the Bible, and yet many Christians quote the Bible to support their calls against genocide. What is truly happening is that the culture is pressuring Christians to hold certain views as morally good, and Christians are selecting, or "cherry-picking", Bible passages that support their ideals rather than acknowledging the contradiction found in Scripture between our modern dislike of genocide and the Scriptural mandates to support it. If Christians were to be truly Biblical, they would support the wholesale murder of all Muslims and resettlement of their lands by Christians or Jews.A more whimsical look at how our culture dictates our choices is reflected in my post last year about the mistaken belief that Christmas is about Jesus (http://me-as-me.blogspot.com/2009/11/get-mas.html). At any rate an interesting blog post about morality adds much more to the discussion than I can at this time- http://www.centerforinquiry.net/blogs/entry/why_should_i_be_moral/
I am interested in your thoughts.