actually......... we were not designed to be meat eaters...if we were we would have differently designed teeth... to tear and shred flesh. We are vegitation eaters with teeth designed to grind. Try this test....
When you see a squirrel cross the road do you think to yourself "yum!" and start to salivate?
When you see a cow in a field do you feel the urge to run up and "git yerself a drink?"
Cow's milk is designed to turn a small 100 or so lb animal into a very large animal-- in a short amount of time. Human milk is for baby humans....and only for a short amount of time.
Humans also have to cook meat before it's eaten safely. Carnivores don't have to. and so on and so on.....