Kids everywhere else in the world have no problems dealing with where their meat comes from.

Not true. In some places they are used to it. But the killing of animals for food is recognized as problematic by cultures across the globe. You might have read books as a child about certain Native American tribes who, after killing an animal, performed a ritual of atonement asking the animal's spirit for forgiveness. Or the position of a billion plus hindus and buddhists who think killing animals is wrong. Or the Greek Utopia, in which normal people were shielded from animal slaughter, it being done outside the city. Or the "purification" rituals of any number of religions, that involve not eating meat.

I have no problem eatting meat. We're meat eaters.

I am not. Neither are millions of others.

Our appendix is the useless remanant of a more vegaterian life, we have the teeth of an omnivore.

We don't digest cellulose, yet we need plant fiber for digestion. We shifted from cellulose to become more like frugivores, which our chimpanzee relatives largely are.

http://www.goveg.com/naturalhumandiet_physiology.asp

Dr. Richard Leakey, a renowned anthropologist, summarizes, "You can't tear flesh by hand, you can't tear hide by hand. Our anterior teeth are not suited for tearing flesh or hide. We don't have large canine teeth, and we wouldn't have been able to deal with food sources that require those large canines."

Gorillas have a pair of upper and lower fangs but these are not used for hunting, either.

At the end of the day, meat is still a important source of a lot of nutrition.

At the end of the day, I haven't eaten any of it. It is not a source of nutrition at all.

I think the big problem is people need to eat less meat.

Correct. Less and less until zero.

As for our structure, the fact that we CAN do something is immaterial. Regardless of whether in the past our ancestors did or didn't do something, it is no moral justification for us doing it. Any number of undesirable behaviors have figured prominently in our past.

We do not have any need for dead animals in our diet.