I have a very "live and let live" attitude toward people's diets. It's not my business unless they're putting themselves in danger by being bulemic/anorexic.
In college I had a friend who was vegetarian and I was cool with it and she was cool with what I ate. No trying to get the other to "switch sides"
On the flip side I had a friend who was a "hardcore" vegan. She wore vegan shoes and verbally attacked anyone who ate meat. Called them "murderers" and such. She'd talk about how much healthier she was than me. She was my roommate on a cruise and would eat at least 2-3 desserts a night. Who's more healthy? The person who had a steak with no dessert or the person who had triple helpings of vegan sushi and three desserts?
Also, those desserts had milk, eggs, and cheese in them. And that pizza she had for lunch - that had animal products on it as well. If you're going to take a "holier than thou" stance it helps to actually be "holier than thou"
If anyone ever gives you a really hard time about your diet just quote Spock - "In a strict scientific sense, Doctor, we all feed on death - even Vegetarians." Nobody can argue with Spock - who was a vegetarian himself.
"All our dreams can come true -- if we have the courage to pursue them." -- Walt Disney
We must have different Gods. My God said "do to others what you would have them do to you". Your God seems to have said "My Way or the Highway".