Peace illyric0,
That's what baffles me about the Qur'an. This book was supposedly from Allah and yet very little details are written in regards to history of many of the prophets that are well known by name. I strongly believe that many of the stories (history) came from the teachings of the Jews/Christians back in the days of Muhammad which may explain the lack of Jesus's teachings (spoken by Christ Himself) in the Qur'an.
I am sure Omega or Alpha can enlighten you with more detailed info as to why.
Brother in Christ,
Eddie