This is probably true, although the ratio varies regionally. Around my place it's usually the meat eaters who are obnoxious because they become insecure. I also know places where you find a whole lot of zealous vegan missionaries.

What’s unfortunate is that vegans, for some reason, unlike any other human on earth, simply cannot keep their self righteous indignation to themselves and feel compelled to shove it in everyone else’s faces. THAT is what’s unfortunate.