We all know that the justice system is crooked. Building companies have been earning billions of euros by fixing prices, and the only one who was punished for the whole practice: the whistle-blower! That's the Dutch justice system
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I don't know if MJ is guilty or not. I do know, especially in the US, enormous amounts of money can be earned in trials like these; it also means that a victim has to prove much more conclusively that he / she is a victim of another person, to get monetary compensation.
I don't know if the abuse happened or not. The problem is of course that the defense can create doubt, by pointing at the possible ulterior motives. Of course, that is something that is hard to dispel; it took years before MJ was put on trial, which has consequences for the prosecution of course.
I would not send my kids to him either. But I can't think of a music star I would consider doing so.