I agree completely with the sentiment that there's enough vegetarian bashing from people who aren't, or who don't think making personal food choices is appropriate--no need to incorporate that attitude into how we treat each other (or anyone else for that matter!)
Just a small point, however...
I grew up Roman Catholic. In college in the mid-70s I spent a year keeping a full-tilt, orthodox Jewish kosher kitchen before that roomie decided it would be better for her schedule to take her meals on campus. Both Catholicism (all variations) and Judiasm have a long tradition of considering eating fish 'meatless.' On Catholic fast days, I was by religion abstaining from meat, even when I ate tuna casserole. I had a collection of Jewish friends who considered themselves vegetarians, because the fishes they were permitted were pareve...neither meat nor dairy.
These are religious traditions I never questioned, nor had questioned, until like the early 90s...when eating vegetarian seemed to take a peculiar political twist and some people started to get a little too holier-than-thou about their ethical eating choices versus everyone else's. I found it absurd then, as I do now. It's not like we have a secret handshake or a membership card that defines vegetarianism, and I don't think you can do it on the pure science of sentient life either--we don't really know enough about life. Everyone has to make his/her own menu choices based on traditions, religion, economics, etc. And what it boils down to when defining vegetarianism is what your traditions, religion and economics, among other things, define--lacking a international set of standards to which all humans without question subscribe.
YMMV, but at least we should all be able to agree that there are many more important things in this world than defining and applying the label of 'true vegetarian,' which is a meaningless appellation at best.