Honestly Ursus, this is being ridiculous, surely you can agree that by studying the kennewick man we can learn very much about earth's history. He could be a european, who knows. We could learn something from him that could completely remap history as we know it. Who knows!
Though maybe after we've done everything possible (testing all the possiblilities) we'll have him buried, but honestly...
Also, I'm very muched biased too I suppose, I'm an atheist and have little sympathy for people's rituals who to me are pointless....