Beck veers into Chariots of the Gods territory, implying the Indians came from Egypt or the Middle East. Many of these von Däniken-style theories are based on the similarity of Mesoamerican and Egyptian pyramids. We know the subtext of these claims: that Indians weren't smart enough to invent civilization or build pyramids on their own. But one man has shown how Indians could've raised monuments without help.
Beck got most of his "information" from a DVD called The Lost Civilizations of North America. I haven't seen it, but I'm sure it's the usual mishmash of speculative theories presented uncritically. Clearly that's Beck's approach also. He admits he doesn't know anything about Indians, but he presents the DVD's claims uncritically.
Adair's take on this:
For more on the "lost civilization," see Lost Tribe Settled Around Great Lakes? For more on Mormons, see The Indian-Mormon Connection. For more on Beck, see Beck's Stupidity About Tribal Summit.
Below: Wow, they look just like Indian mounds!