The Catechism of the Catholic Church states "480 - Jesus Christ is true God and true man, in the unity of his divine person; for this reason he is the one and only mediator between God and men." and affirms it another 11 times. That, however, will not be sufficient for a fringe nutjob so we can expect to see the lie repeated ad naseum. Some old dogs are just not capable of learning new tricks.
I know. When I put a question like this out there, I feel like the mean little brother/sister pinching my siblings arm just to instigate some trouble.
The “use the Bible to try to thump Catholics” crowd obviously don’t pay too much attention to what Jesus actually says and does in the Gospels. Otherwise, they might understand that Jesus used people and temporal things to teach His sermons as often as He used Scripture.
Also, they would know that Jesus is the Lord of the living and not the dead.
What does the Catechism say about the priesthood of the believer?