Keith is a preacher and the woman (who recorded the rant) and told him that his daughter is "one of the most wicked people" and that she's "a Satanic woman who has lead millions to hell."
Wow, that's a pretty serious accusation!
As she confronted him, she kept saying he was the "daughter of Katy Perry," but Keith obviously figured out what she meant. She also blamed him for the fact that Katy is leading all of these people (including her son, apparently) 'to hell,' with her videos, even though he explained that he has nothing to do with any of that. She seemed especially upset with Katy's "E.T." video.
TMZ that this is the first time someone has come at him with such fury over Katy and that he actually feared that she was going to physically assault him. Despite that, he said he actually feels sorry for her, telling them that she's "a bitter and angry woman trying to blame my kid for her kid's mistakes."
So far, Katy hasn't said anything - at least not publicly - about the situation.