I knew a Muslim guy who would point out how everything I did was sin. By that I mean, I drank alcohol or ate pork and he needed to comment on how it wasn't halalalooloo or something. We walked into a commercial centre once and he literally said "smell that sin in the air". Our differences got in the way of our /friendship/ but god damn it stop commenting on my loving lifestyle.
That said, I know Muslims who aren't like that, but god damn it I bet the people who are are just jealous they can't live a liberal lifestyle cause of Allah's eternal spanking.