Killing other intelligent beings isn't remotely the same as killing dumb animals that exist for the sole reason to be eaten.
Humans are worth no more or less than animals. You have no proof that animals exist solely to be eaten. That's a religious notion. You might as well be a religious fuck.
If humans are worth the same as animals, why do you find us eating other animals so detestable? We aren't worth more anyway.
Worst thing you've done to an animal?