Don't you think vegetarians mostly show tolerance towards omnivores every day of their lives thatbags? After all we are still in the minority and virtually every eating place serves meat. We are exposed to it in cafes, restaurants, on the street, in buses, trains, aeroplanes, you name it. How often does a vegetarian 'have a fit of the vapours' about it? I certainly don't although I am not exaggerating when I say that the smell of it makes me feel sick.
I only wish we were accorded the same level of tolerance by people who want to question our choices, poke fun at them, try to catch us out, point out that plants are living things too (yawn) etc etc. Not saying that happens on here, but it is an everyday reality for most vegetarians.