What Muslims know about Christianity is a reflection of how much Christians have revealed the essence of Christianity to the world. Who else stands better to showcase your religion if not you? It behooves on Muslims to educate non-Muslims about Islam. In this respect it is safe to say Muslims are wanting.
Within Muslims themselves there’s the need for more education to better understand what the Kuran says. How many Muslims understand Surah 9:5? I don’t think you expect non-Muslims to educate Muslims about that.
The misconception of the Koran gives birth to unimaginable hostility from the part of Muslims. There’s the urgent need to demystify Islam.