I'd understand if it were making fun of the animal for getting killed so long as it was humane, and people who worry too much about them. I'd understand the idea of "yeah I know it's bad, what am I going to do. It tastes good". I could understand making fun of an exaggerated claim of suffering. I could understand making fun of trying to avoid killing in the world which is probably literally impossible. But I can't understand making fun of real suffering, and furthermore making fun of people who care about it. I don't think they're actually sociopaths but I don't understand how else to interpret what they're expressing here.
If the answer is "hey don't take it seriously, you were a jackass in college too" - fair enough, but you brought this up as an example of the general population just not caring enough. Maybe your friends actually made these jokes to deal with their discomfort with those videos?
And yes for disclosure, I'm a vegetarian myself.