I think what happened is that the Trumps campaign created Pizzagate in order to retaliate against Clinton for all of the women coming forward and saying that Trump had raped and molested them.    Trump felt that Clinton was behind all of these women coming forward at the 11th hour of the campaign to accuse him.   So no doubt his campaign probably decided to smear her too with sex abuse allegations.

This will easily go down in history as the dirtiest, most ugly political campaign the United States has ever had.