The Prophet Mohammed has nothing to do with them. Some of his ardent enemies (The Hypocrites) lived in Al Madina under his authority as the leader of the State in that time. According to the unlimited freedom of speech and belief in Islam , every one is free to say and in believe as he chooses as long he does not compel other in religion , and /or persecute them and /or kill them unjustly.
7- Did he ever make anyone, man or woman, end their marriage because they weren't married to Muslims?
Absolutely not.