*He was, in the past, an alleged frequent commenter on Free Republic under a fake name (not to say Freepers are like him, most are not), and he has a far-right blog.*
I can’t help but notice the complete and total absence of any supporting evidence.
from Wikipedia - (who knows how valid that is?)
Others claim that he was a prolific poster to the right-wing Free Republic message board under the pseudonym “marc costanzo”. [1]
What do you mean? This is real "journalism" and an anonymous "alleged" should be good enough for you.