It probably comes down to the introduction of ethics into the mix.  If ethics were not introduced as part of the argument for the dietary choice, most omnivores who make it an issue probably wouldn&#x27;t.<p>Personally, I don&#x27;t care what others eat.  They could eat tasteless fiber, or artificial meat-tasting protein or actual meats.  It&#x27;s their choice.<p>On the other hand, if I&#x27;m a guest and there are only vegan choices, then that what there is, likewise if I&#x27;m a guest and there is only steak, that&#x27;s what there is (and I don&#x27;t like steak).