All of these tools but zero human fossils?

Stone tools will survive without the need of special circumstances. Fossilization requires extremely specific occurances to take place. I can't imagine that fossilzation happens to the average corpse at rates higher than ten-thousandths of a percent... Otherwise we would be neck deep in fossils?

Well, this is kind of ironic. It would be funny if it turned out the native Americans had wiped out the previous lot of native Americans and they were Europeans.

I've never subscribed to the whole "you took our land" pathos. The randomized and millenias-long process of human migration coupled with the inevitable human propensity for battle over resources and territory pretty much guarantees that the most recent occupants stole the land from a previous group who in turn stole it from an even earlier group, who in turn stole it from...