I don't think white supremacists would have much interest in some yarn about Vikings getting their asses kicked by Mayans.
Or you could just not mention the context of the evidence. It's not like most readers are going to bother following up checking it for themselves to see what it really says.
The article seems highly suspect to me, a few hours ago I noted that it contains inaccurate statements about historical metalworking. That I caught that mistake makes me suspect there are other errors I didn't catch. But to insinuate some white supremacist motive without evidence doesn't make any sense to me.