So your knowledge of Christianity is even beneath that of an utter novice.where did you hear this horseshit?
Even the founders of Protestantism - Luther and Calvin - believed a genuine conversion to faith in Christ would have ethical consequences.
If one actually genuinely accepts Jesus into their heart, they should begin to see ethical improvements in their life consistent with Jesus' teachings, even if they still sometimes fall short of the mark.
Anyone who fails to see any sort of ethical improvement in their life, means the conversion to faith in Christ was fake and not genuine.
That is precisely why there are so many fake Christians on JPP and in MAGA