We all are speaking with Full knowledge, but you are not.What if Jesus and Muhammad are brothers who love each other and are closer to each other than we can ever be. Do you still say Muhammad is ignorant? If you look at your hand and spread your fingers as far apart as you can you can never place your thumb next to pinky finger or place pinky finger next to thumb and likewise are Jesus and Muhammad like the middle and index fingers right next to each other and irreplaceable. Ignorance is with mankind not with the messengers of GOD the creator. So speak not of what you have no knowledge.
God the Father is Not "Allah" and "Allah" is no God. Period.