If a murtad returns to Islam, will all his past sins be forgiven?

Answer

If a Muslim becomes a murtad (leaves Islam), then the sins he had committed whilst he was a Muslim will not be forgiven automatically. He has to make Taubah. The reward of irtidaad (becoming murtad) is not forgiveness. It is everlasting Hell-Fire. The sins of a kaafir are forgiven when he/ she embraces Islam.