*CONTINUITY  OF  MESSAGE*

Islam  is  not  a  new  religion. It  is,  in  essence  the same  message  and  guidance  which  Allah  revealed  to  all Prophets. The  message  which  was  revealed  to  Prophet Muhammad  (peace be upon him)  is  Islam  in  its comprehensive,  complete  and  final  form.

The Prophets were the best examples amongst their people in character and righteousness. They lived in obedience to God, with excellent morals and were always truthful in speech and conduct.  
legacy.quran.com/2/136

Prophet Abraham (peace be upon him) was MUSLIM “Ibrahim (Abraham) was neither a Jew nor a Christian, but he was a true Muslim.” [The Quran 3:67]
legacy.quran.com/3/67

Prophet Jesus (peace be upon him) and his disciples were MUSLIMS.
"  The  disciples  said,"  We   are  supporters  for Allah . We  have  believed  in Allah and  testify   that  we  are  Muslims  [submitting  to  Him]."
legacy.quran.com/3/52

The prophet Muhammad (pbuh) did not bring a new message, but conveyed the same message as previous prophets.