Here is another interesting article that explores the love/hate relationship with cats in the Middle Ages: https://www.worldhistory.org/article/1387/cats-in-the-middle-ages/ (Warning: contains graphic descriptions of people torturing cats)

That's not exactly what the article says, though- it tempers the idea that cats in the Middle Ages were only seen as evil, by giving examples where cats were also much loved as pets, but it doesn't claim that it is a myth altogether.

Horrible Histories is brilliant! It rekindled an interest in history I had kind of lost since I left school. I'm a grown-up and don't even have children so I'm slightly embarrassed to say I love it, but honestly there are facts about British history that I know purely from watching Horrible Histories (I didn't grow up in the UK)