I'm sorry, but this is the most pathetic excuse for anti-vegan nastiness I've ever heard. Vegans are generally extremely good-natured at dinner parties and will happily eat bread, potatoes, and dressing-free salad while the meat-eaters feast on all kinds of animal flesh in front of them. That kind of gentle kindness does not stop meat-eaters from attacking vegans at every possible opportunity.
This has happened to me, by the way. Soon after I went vegan, I went to a dinner party with my husband. We brought a vegan dish and ate some of that, as well as the side dishes that happened to be vegan. The host placed a giant plate of lamb in front of me and my husband, thinking that it would upset us. One of the guests suggested that it should be moved, but the host insisted that it stay there. She then started talking about how much she likes to wear fur. One of the guests responded that killing a wild animal was cruel, but eating an animal raised for food was good. When I politely pointed out that the latter suffered much more than the former, I was attacked for about 20 minutes by every meat-eater around the table except one. After they recited every excuse they could think of for eating meat, everyone got up and left the table, and they didn't even bother to say good bye as we left. Those people thought they were hurting us, but all they were doing was showing their own ugliness.
Meat-eaters who attack vegans are full of hate and insecurity. And they get what they deserve. There is, after all, a kind of karma in this. The meat-eater who takes such pleasure in insulting and attacking vegans will be dying from heart disease and Alzheimer's in a few years. Even if they're one of the few who manage to live longer, I have to think that the insecurity that makes them so nasty must make them unhappy in other ways.