He is not talking to "the people" or the public or his supporters in general. He is talking to the purveyors of the specific narrative of what those files are which has not been portrayed accurately. The strong response and backlash from "MAGA" is probably due to the untreated decades and decades of physical, psychological, and emotional abuse that were covered up in the US. There are lots of parties involved in that game and for different reasons but that type of conditioning made it easy to identify with a specific narrative.