In that comment it was the farmers wife who trained the pig to live in the house like a dog, and then the farmer himself who killed the pig.

I do agree that doublethink is widespread (just look at how we treat other humans, no need to go across species) but I think these are choices that happen on a personal level and can hardly be generalized. I know people who stopped eating octopus after seeing My Octopus Teacher, and I've seen Chinese restaurants serving dog meat. We live in a world full of contraddictions.