Hunting is an instinct. It is part of human history that dates back many thousands of years. Anyone who eats meat, which Im sure includes your classmate, has no right to question the ethics of hunting.
Personally, I feel no need to advertise that I hunt. I dont wear hunting apparel, camo, or clothes with weapon/equipment logos, in public. I dont put hunting decals ,or even my clubs ID sticker on my truck. I do not talk about hunting, or display hunting photos at work. I do not even let my neighbors see me carrying gun cases to and from my car. Im not saying everyone else should hide that they hunt, but I just feel the negative vibes it tends to attract, outweighs any pride I get from displaying it.