I once had to deal with an extremely challenging legal situation with an ex-business partner.
This man one million percent believed that we had tried to destroy his business when we ended our contractual relationship with him. In spite of the fact we had a robustly evidenced paper trail of the fact that we wanted to end the contract generously exceeding the contractual terms, what he THOUGHT we'd said and what he'd FELT about that were considered prime.
He launched a series of attacks on our business for over a year based on those beliefs. It's quite frightening to know that people like that exist, and being on the receiving end put me out of work through stress.
But I imagine Harry has a more limited capacity to remember details, in fairness. He reminds me of another ex colleague (who incidentally tried to half-in half-out working for our business whilst also moving to California with his wife - he was ginger too!). Not remotely involved enough in the detail to understand what was going on, didn't need to remember because that was someone else's job.