Zinc saidLot's of neanderthal DNA in many of us already.
But that doesn't make it right in my opinion. I mean, they're extinct for a reason.
They're extinct because they were inferior organisms. Hypothetically, cloning them would be extremely beneficial. We would be able to gather a lot of information regarding their capabilities, maturation, and be able to fill in missing information for such research projects going on such as the Human Origins Project, and the Human Genome Project.
Neanderthals most certainly did have emotions, although not as comprehensive as present human emotion (all organisms classified in class mammalia do have feelings/emotions as a result of their highly developed cerebrum) - but that wouldn't and shouldn't stop geneticists from cloning a Neanderthal given the chance to as the benefits outweigh the possible negative impacts. We experiment on chimpanzees, and their DNA is ~99% identical to that of human DNA, so why not 'versions' of humans that have failed? Their failure may be the key to solving our potential failures.