They just do not know any real reformation history.
I had one Catholic tell me Luther left the church because he wanted to divorce his wife.
They are kept ignorant
I’ve heard all kinds of bogus history and theology. Perhaps people are kept in the dark, but Jesus is the light of the world and the light shines in the darkness and the darkness does not overcome it.
His sheep hear His voice and know Him and follow Him. Those who do not hear His voice are not His sheep.
Yet, HE calls His sheep by name. If He doesn’t call, then they were not His to call.