Bad? Apart from your own moral opinion, how is killing bad?

Why is killing a plant better than an animal? Because their chemistry includes some sort of pain hormone? So do some plants.

This is not an argument either of us can win, because it’s a morality question to which there can be many answers.

I simply don’t see how eating only plants is more moral. For all we know free grazing animals that we eat are way more happy and stress free during their lives than in the wild. Just like humans spent most of their last 50k years on the verge of starvation and barely surviving. Our current state of abundance is about 60-70 years old (20 for third world)

Dude. Because plants don't have a central nervous system. Animals do. Plants don't feel pain. Animals do. It's not hard.

So would you be okay with slaughtering animals painlessly and then eating them?

No: An animal is capable of having a subjective existence, emotions and sensations. Slaughtering them needlessly (ie., for luxury purposes) is not okay to me.

The planet is warming. Biodiversity is plumetting. By not eating meat we can have FOUR TIMES the food or keep the forests in place as REALLY NICE. Its not just the animals suffering. It will be many of us suffering as we burn the earth to fill our greedy bellies.