I'm a Christian in medical school who doesn't believe in parts of evolutionary theory. There are four major components of evolutionary theory of which I'm sure most of you are aware. Natural selection, micro evolution, macro evolution, and common ancestory. The first two of these are observable, proven, scientific theories (I am always cautious to use the term scientific fact on anything). I believe that given enough time the last two are also certainly possible in the future, but I don't believe they are the definition of our past. That is because of my Christian faith and how I regard the concept of creation as central to my faith, much like many of you regard evolution as central to biology. Does it make me stupid for not believing that we are the result of macro evolution and share a common ancestor with chimpanzees? No it doesn't. The hypotheses of macro evolution and common ancestory (on a large scale such as birds share a common ancestor with dinosaurs) are clever ideas, but they have not been tested or proven. I agree that it is important to understand natural selection and micro evolution to be a good physician. Otherwise you don't understand antibiotic resistance or vaccines/immunity very well. But understanding the other two elements are a matter of your personal belief, which you are free to choose, and will not impact your ability to diagnose and treat patients.