Why did Al-Jawad marry the daughter of his father's killer?

Answer

In the name of Allah: Would you ask why the Messenger (PBUH&HF) married Aisha who was the reason of killing thirty thousand Muslims, whey he (PBUH&HF) married Hafsa, why the prophet Moses (PBUH) married Zipporah who fought his successor (Wasi) after him, and also the prophets Lot (PBUH) and Noah (PBUH)? Why did Imam Hassan (PBUH) marry Jaeeda, daughter of Al-Ashath, who is the fruit of the cursed tree? Not all the reasons of the infallibles' (PBUH) are known to us, but what we know for sure is that they do not go beyond Allah's rules. Allah is the all Guide.