The notion that whites stole the land and killed off the Indians is important for maintaining that guilt.
Since the end justifies the means....this man and his findings must be defamed, hidden, or lied about.
Not only that.........
Imagine if, upon further research, it can be shown that Europeans were exploring the East Coast of North America around the same time that the Indians (who were originally Asians) were exploring the West Coast.
What would that do to the notion of "Native Americans"?
Perhaps both Europeans & Asians were ancient immigrant groups to the New World at about the same time.