The argument is as old as time and yet yorie absolutely wrong about all of it.

is it ethical to kill?

Under many circumstances, yes it is.

do humans need meat to survive

Not all do, but approximately 1/3 humans have any one of half a dozen different conditions that make them unable to thrive on a vegan diet, even with the expensive supplements that price many working people out of veganism.

Is animal agriculture equivalent to slavery?

No, and you saying so is an insult to every enslaved human on Earth.

if you eat meat, deep down inside you know you're supporting: murder, rape, entrapment, torture, and slavery. that includes eggs and milk.

Works cited: crackPipe.png

And your salad has much more exploited human labor in it than my steak has exploited animal labor. Maybe work on ending the exploitation of your own species before trying to equate your fad diet with ethics?