Pope Gregorius IX issued a papal bull, Vox in Rama in 1233, which is often cited to be the reason behind the massacre of cats (especially black) in medieval europe. These claims seem to be dubious at best and there seems to be only a few mentions of a black cat being idolized by some luciferian cult.
I couldn't find any written evidence to support these claims. Are there any physical evidence etc. about any mass persecution of cats in the region, organized or unorganized?
We have some previous answers that discuss the supposed cat massacre:
How did cities of Middle Ages handle pest control without cats? by u/carmelos96
Why did Poland have lower rates of Black Death than other European countries during the 1300s? by u/mikedash
Spoiler: it seems to be some weird thing made up on the Internet!
I just wanted to point out that in my answer linked by u/WelfOnTheShelf I spent a lot of words debunking the claims of an article linked by the OP in his now deleted question, so if you don't understand what Antoninus Liberalis has to do with cats, don't worry. Anyway, no. It's true that cats in that period began to be demonized (even though it wasn't a universal sentiment) and that there were burnings of cats in some traditional festivals, like St John's day, especially in France (the first recorded case of this bloody traditions dates to 1340 circa), but there is no evidence of a general, massive near-extermination of cats in Western Europe. The only instances where cats were deliberately targeted to be wiped out violently happened during some outbreaks of plague, by order of urban authorities (for example, in London in 1666). Cats were killed together with dogs and any other animals in the streets of quarantined cities, because it was thought that animal fur could spread miasma. Not religious reasons.