I'd have to ask him questions to clarify what he said. It doesn't make sense that the offensive player can jump into a planted defender. I would think that he meant a defender in the air, although I don't think he said that. Even there, something seems wrong with his interpretation. If a defender jumps straight up, I thought he was not committing a foul, now I am not sure. (If this is the case, I think it's a bad rule. I would still question whether the rules really say that, or if the refs have interpreted it incorrectly.)
What is clear, is that a defender is less likely to be called for a foul if a shooter jumps into him sideways, rather than straight on.