Is this the man who taught Muhammad?

why did khadija think that mohammad had heard from the moon god allah. ilah is arabic for god not allah. allah was the name of the moon god being worshiped at the kaa'ba and had been for thousands of years. why didn't Gabriel know mohammad couldn't read? so why did the muslim god send gabriel to squeeze mohammad and scare him? why did gabrial bring the quran to mohammad knowing he couldn't read it? why do all muslims know the bible and torah are corrupted but not one can show you where they have been changed? so many questions and so few answers!