This has nothing to do with religion and everything to do with politics. The Kennewick Man skeleton is almost certainly caucasian, but only a complete examination will determine this for certain. If it turns out white men were here before the Indians, suddenly the entire paradigm shifts. Indians would have probably wiped out the indigenous peoples, or absorbed them, making American Indian claims to victimization and superior entitlement far less compelling. The "They-Were-Here-First" harangue of the left goes out the window.
The Clinton Administration ordered the U.S. Army Corps of Engineers to bulldoze the site where Kennewick Man was discovered before a bill from congress declaring the site protected could reach his desk (but AFTER it had already been passed). Spokesmen had the nerve to say they were only doing it to protect the location--of course, they destroyed its archaelogical value completely. It was an absolutely incredible instance of minority pandering. This is one of the most shameless examples of left-wing attempts to conceal historical evidence on record.
Not a bad bumper sticker
Kennewick Man Was Here First