For those that think vegetarianism has no place in Buddhism, they are forgetting about the numerous references to not kill or cause to kill or to incite another to kill or to speak in praise of another killing, or even to allow another to kill, in the sutras (Pali and Mahayana) and also the direct teachings against meat in the Lankavatara Sutra and since this is a Mahayana forum, these sutras are relevant.
For those that think an omnivore diet has no place in Buddhism, they are forgetting about the sutras and teachings that seem to suggest some meat eating is acceptable, especially for monks and nuns who receive food on alms rounds (and also the prohibitions on some types of animal flesh, implying that others are okay). Therefore, there is room for both views within Buddhism and neither 'group' is excluded from being known as Buddhist.
I see one extreme form of vegetarians that condemn meat eaters and consider them to not be Buddhist. And then there is another extreme of meat eaters who believe all vegetarians are really Jains and that all vegetarians are "holier-than-thou" and are not real Buddhists and need to be forced to eat meat.
I think there can be a 'middle ground' among both vegetarians and omnivores:
For vegetarians, they can accept that meat eaters are Buddhist too and not take a fanatical position and action in regard to diet. For example, if they discover the soup they are eating has animal fat broth in it, there is no need to spit it out and make a scene. It is not going to bring the animal back to life. They can sit down and eat with omnivores and not complain about what they are eating. If paying for a meal at a restaurant with family and friends, there is no need to restrict them on 'what they can order.'
And for omnivores, they can accept that vegetarians are Buddhist too and not insist that the vegetarians need to be force-fed meat by another, even by a teacher to make some point. The omnivores can recognize that the vegetarians have made a choice with their diet and don't want to be force-fed anything, just as the omnivores don't want to be ordered about what they can and cannot eat.
I have seen aversion, arrogance, self-righteousness, and claims to being 'true Buddhists' by both sides from both extremes. Perhaps a more middle way position among both groups would cool the embers.
So, yes, let's all sit down and have a meal some time together and we can all order whatever we want!