Not surprising at all. He was a minor player in the Current Wars compared to his primary benefactor, George Westinghouse. His image was rehabilitated first by Serbian-Americans and then by webcomic artists and Redditors, who turned him into a secular saint.

Most of what people think they know about Tesla is not actually true if you examine the historical record. But software engineering as a discipline demands business villains and craftsman heroes, and so Edison and Tesla were warped to fit those roles even though in real life there is only evidence of cordial interactions.