"BuT LiOns ThO" aka "it's natural, it's circle of life, food chain, animals eat other animals, humans are omnivores, etc."

Is-ought gap. It has been understood for a few centuries. Might wanna look into it.

"it's PeRsONAL cHOice" aka "don't force your morals on me"

Being a pdf file is a personal choice, don't force your morals on me! Also, maybe don't make normative claims that are self-undermining, could help your case. (And before you respond the way I know you're going to, maybe learn what a counter-example is)

"Plants are alive too!"
And yet no brain, just like you

"CrOp dEAThs tHo"
Good thing the 100 billion farm animals killed and tortured every year eat only air, that way we can avoid crop deaths by eating them.

"BUT MUH PROTEIN"
Where do you think the animals you eat get their protein from? There is, in fact, protein in plants. It's also just as good for muscle synthesis. And eating only plants lowers your risk of cancer, heart disease, and diabetes - the three biggest killers of humans. So don't pretend there are nutritional reasons to eat meat. You're doing it for pleasure, that's it.

If any of these obnoxiously brain-dead arguments even crossed your mind, then there isn't even a scintilla of grey matter left in your head.