I thought to answer this, but I thought better to convince this man of his sin. Obviously, he must be living in his sin if he thinks he can take on another mediator. I mean, you can go into the day of the Lord I suppose, but discussing the details of such things with those who don't have understanding and follow a pastor instead of Christ; he's putting the cart before the horse.
For the time past of our life may suffice us to have wrought the will of the Gentiles, when we walked in lasciviousness, lusts, excess of wine, revellings, banquetings, and abominable idolatries: Wherein they think it strange that ye run not with them to the same excess of riot, speaking evil of you: Who shall give account to him that is ready to judge the quick and the dead. For for this cause was the gospel preached also to them that are dead, that they might be judged according to men in the flesh, but live according to God in the spirit.
-1Pe 4:3-6
(i.e. quick and dead means believers and unbelievers)