That’s why deathbed conversions are empty
Only empty deathbed conversions are empty. The criminal on the cross next to Jesus had a deathbed conversion that seemed to work just fine.
Luke 23:43 Jesus answered him, “I tell you the truth, today you will be with me in paradise.”
Dysmas, or St. Dysmas, if you’re a Catholic, was quite possibly unaware of the existence or message of Jesus Christ, giving some semblance of a true deathbed confession upon hearing Christ’s message.
Hitler, on the hand, was very much aware of the message of Christ. He was raised a strict Roman Catholic and considered the priesthood.
Two totally different situations.
maybe in his youth he was a “strict roman catholic”. As an adult he privately despised the Catholic Church (not in public, as that would alienate many Germans and indeed most of Christianity, which he considered “weak” and, ironically, “Jewish”.)
as far as considering the priesthood, I think you have him mixed up with Stalin, who considered becoming a priest in his youth and went to a seminary.
Who are you to judge who was "very much aware" of anything?
Many are subjected to the Gospel but do not respond to it until God draws them in. I wouldn't automatically discount anyone's conversion, no matter how late.
Who would have thought Saul the persecutor would become St. Paul?