The closest thing that I can find to a morally relevant distinction between industrial farming, dogfighting, and crush videos is this: While it’s true that all three acts cause animal suffering in order to give people pleasure, the nature of that tradeoff differs. The consumers of crush videos and dogfighting are taking pleasure in the suffering itself, whereas the consumers of industrially-farmed meat are taking pleasure in the meat that was produced by the suffering. From a purely harm-based perspective, the moral calculus is the same: the animal suffers so that you can experience pleasure. But the degree of directness of that tradeoff makes a difference in how we perceive your character. Someone whose motive is “I enjoy seeing another creature suffer” seems more evil than someone whose motive is “I want a tasty meal,” even if both people cause the same amount of suffering.I think Julia's right that the difference to many people will be that the animal suffering of pigs, cows, chicken, etc., is a by-product, and not the main point. But I also think that difference a distraction.
Personally, I'd really very much like if we all ate less meat, and paid more for that meat, with the result that no animals were treated cruelly.
So, we can continue to be friends even if you eat meat of animals who suffered for that, but if you in any way promote suffering of animals because you or someone else take pleasure in that suffering, then you can fuck the right off.