As a lacto-vegetarian I'm always confused by how personally offended some people can become when I simply pass over the meat at the dinner table. Even today I heard the "boy, where do you get your protein you're going to starve to death" schtick while my styrofoam plate was cracking under the weight of vegan baked beans, steamed broccoli, and mashed potatoes with way more butter than necessary.

Eh, it's cultural.