I hope and pray your pastor is not consistent in practicing this. To “not call out the sin of the non-christian” is to refuse to evangelize him.
For men to be saved, they need to know their need for a Savior. To know their need for a Savior, they need to know what they need to be saved from, and that is the sin in their life.
How can you proclaim good news without first proclaiming the bad news it saves you from?