Vegetarianism is next to Godliness?

I was driving mid-evening yesterday and saw the side of a truck plastered with the slogan: "Honoring God's Creation..." I never knew that there was a Christian Movement that gave biblically justified reasons for going vegetarian, but then I wondered how they explained all the sacrifices and the feasts that riddle the bible they purport to follow and thought, perhaps this was another kind of cult. I wonder what omnivore Christians think of this organization.