Regarding the affection/love and eating thing, something in the same line of thoughts was discussed in the last ep of Uchoten Kazoku.

Hachiken just made it more difficult for him on a psychological level when he named that piglet. That's all there is to it. But at least he's slowly understanting what he wants and goes that direction. He prefers eating meat.
Others would choose otherwise and decide not to eat meat.

Regarding the murder part, it's a tricky thing.
Living beings feed on other living beings to survive, even when they are plants...
I guess as self proclaimed "superior" race, we should enforce more rules on food spoiling, because the real crime is there. Killing and letting food go to waste.