Buddy , you are in a catch 22 situation . I understand you not trying to offend anyones but did you cross checked the information feeded to you before asking the muslims the so called POINTED QUESTIONS? Muslims definetely do not believe in Muhammed marrying his daughter in law simply because he had no daughter in law in the first place!!!
atleast respect the insanity of over a billion muslims across the world if ur mind doesnt work!!