Why do Muslims believe that Muhammad spoke with an angel?

Yes we believe he spoke to angel Gabriel the same angel who spoke to abraham moses noah solomon jesus before when they were getting information from god and the same angel informed muhammad about being last final prophet for the whole of humanity and all the messeges were said same that god is 1 there isnt wasnt never will be any other god besides the 1 true god who is for forever who has no gender no partner the supreme all mighty and moses was a prophet and there is no other god besides allah and jesus is his messenger there is no other god besides 1 allah alone and muhammad is the last final messenger of god. If you believe the truth you go to heaven and if reject the truth you go to hell it does not effect god whether you believe or not because god is greatest and jews and christians are lost without Quran the final revelation and testament of god and will be thrown in hell fire for disbelieving to what god has revealed to the whole of humanity. If you want to believe make a choice now or wait until you see the hell fire and you won't be able to return and change anything after death and this journey will end and there is nothing that is for forever except god alone and there is nothing like him he is 1 and unique.

I cant really gove you an answer,but what I can give you is a way to a solution, that is you have to find the anglde that you relate to or peaks your interest. A good paper is one that people get drawn into because it reaches them ln some way.As for me WW11 to me, I think of the holocaust and the effect it had on the survivors, their families and those who stood by and did nothing until it was too late.