To each their own, IMHO. I eat lots of red meat, mainly because I'm currently trying to put on some pounds and every bit of protein helps. To be honest, I don't know if I could go without eating steak ever again, it tastes too good. The same can be said for pork, chicken, and other meats that I eat. I do not eat them because I feel we're on this earth to eat animals, I eat them because they taste delicious.
As far as Vegetarians and Vegans saying they're right, or vice versa with meat eaters believing we're here to eat animals; it's silly and should not be argued. Unfortunately though it's human nature for everyone to think they're right.
I have very harsh feelings for PITA, and other such organizations that try to force their beliefs on everyone else solely because what they have seen in a few slaughterhouses. If they choose to be vegans, then that is wonderful, I admire their courage and strength to be different...and to stand up for what they believe in. However, when they attempt to put themselves on a pedestal, or try to put organizations out of business because of what they do, I have a problem.
Wow, if that even makes sense to everyone I'll be happy, it's early and that was one weird rambling of words