Aggressively trying to force their ideas on people is obnoxious. People should be free to make their own choices. If people want to try vegetarianism, be a resource for them. Don't shove it down their throats and brag about your superior moral values. It makes other vegetarians look bad.
No one cares if you don't eat meat. As for lashing out I believe you already had that covered. And I can give you the greatest plot twist of this post. I've been a vegetarian for over 25 years; I've been vegan for over 7 at one point.
Your argument is completely invalid. Don't make me look bad because you want to brag about your convictions. This is why I dislike my fellow vegetarians.