99% of our uses of animals, including our numerically most significant use of them for food, do not involve any sort of necessity or any real conflict between human and nonhuman interests. If animals matter morally at all, then, even without accepting a theory of animal rights, those uses of animals cannot be morally justified.

There is no difference between sitting around the pit watching dogs fight and sitting around a summer barbecue roasting the corpses of tortured animals or enjoying the dairy or eggs from tortured animals.

...eating animals involves an intentional decision to participate in the suffering and death of nonhumans where there is no plausible moral justification.

99% of our uses of animals, including our numerically most significant use of them for food, do not involve any sort of necessity or any real conflict between human and nonhuman interests. If animals matter morally at all, then, even without accepting a theory of animal rights, those uses of animals cannot be morally justified.

We do not think clearly about our moral obligations to animals.

All sentient beings should have at least one right—the right not to be treated as property

So it is always preferable to discuss the matter of veganism in a non-judgemental way. Remember that to most people, eating flesh or dairy and using animal products such as leather, wool, and silk, is as normal as breathing air or drinking water. A person who consumes dairy or uses animal products is not necessarily or usually what a recent and unpopular American president labelled an "evil doer.