There were many people over many studies that were responsible for mRNA vaccines and you don't hear them agreeing. Robert Malone had a small contribution early on. He's probably stirring controversy for publicity's sake.

Coming up with the landmark experiment for this technology is no „small contribution“.

Described in this Nature piece, where the first few paragraphs are about Malone. https://www.nature.com/articles/d41586-021-02483-w