What underlies that, I think, is the belief that most of these women are making it up, or somehow treating a man unfairly to start with. This guy really thought that a significant number of rapes were due to women rescinding consent in the middle of a sexual interaction.
No one wants innocent people to be accused or prosecuted and I'm all in favor of throwing the book at those who do, but that doesn't mean we shouldn't do a much better job of punishing those who do behave criminally, who do wreck the lives of others - something that takes place every 73 seconds.