Rebunker 

This is someone who claims to be a debunker but simply respreads propaganda.

Tyler claimed to be a debunker, but spread the same old rebunker lies of his party.

Rebunker by I, Wreckerrr October 29, 2021

rebunked 

1. To create/revive the falseness or hollowness of (a myth, idea, or belief).

2. To protect the sham or falseness of <rebunk a legend>

A Proper noun is Rebunker.

The advocate of the Hollow Earth Theory went into the comments section of the video to have the theory rebunked using federal-funded websites and in a attempt to stop people from questioning it.

rebunked by The Painful Reality June 5, 2016