There is an answer to this mess, and it is real ‘repentance’: Teshuvah. Not a two minute prayer, but a life-long journey of Torah study and obedience. For Torah is Life, the ‘Yoke of Heaven’ which constrains us to do good and eschew evil. By it a nation is exalted, and by it kingdoms are brought to ruin. Torah undergirds all cosmic laws, physics and quantum mechanics, and it’s authority is supreme throughout the universe. When the blended Christian movement wandered away from its root, it left with a partial, limited inheritance. The spectacular Western Culture it produced has come and gone. Christianity has failed to bring the Redemption of History. Why? The Nazarene said that his movement would destroy the very gates of Hell. What went wrong? See Yeshayahu (Isiaih) 8:20 - “To the Law and the Testamony: if they speak not according to this word, it is because there is no light in them.”
They convert in prison because Islam allows them to justify their crimes because many crimes like rape and murder are fully justified in Islam.