Fictional evil characters are extremely popular in media.
Jack O'Connell is a talented, conventionally attractive man and his character was powerful, charismatic, and compelling.
He was supernaturally evil and that evil wasn't tied to him being Irish. He was depicted as more sympathetic than the KKK who sought to kill out of hate instead of a supernatural compulsion.
No, but I can see someone causing a lot of harm and blaming ai for it. It's already happening on a small scale.