>>713421609>>713421853"Moors" was, incorrectly, used as kind of an umbrella term encompassing a lot of darker-skinned (including black) ethnicities for a long time because most people couldn't give less of a shit about those details. Basically any African would often be described as being "Moorish", despite having no connection to the actual Moors.
So basically the idea of Moors being black is people unintentionally reviving an obsolete and racist use of the word.