You would be wasting your time. There is simply no effective way to argue against a willfully ignorant dogmatist.
I am wasting my time only if I am doing it to convince dogsgod. The very fact that he hasn't done any research, but only looked for sensationalist sites to back up his preconceptions, makes any argument against those preconceptions useless.
However, I continue to ask him to present scholarly sources to back up his views, and not to continue to misrepresent the only two scholars he has provided, for the sake of others reading the thread. I wouldn't want anyone reading the thread to think that there is any possibility of actual research behind his bogus claims.