Question:
I know that Pharaoh did Teshuvah after the Exodus from Egypt – so was he forgiven for what he did to the Jews and if so would someone like Hitler be able to be for his actions?
Answer:
Nothing stands in the way of Teshuvah (on condition it is real sincere teshuvah).
Sources:
Medrash Rabah Devorim 2;15, Pirkey DeRab Eliezer 43