Yes and no. Splitting of the moon in arabia does not mean that other people in other regions will notice it as night and day are at different times for different regions. God was the one who split the moon and glued it back together.
Muhammad was just a symbol of God's power. It was similair to how Moses split the sea (it was actually God using Moses).
Yes there are cracks on the moon. And they have been there since long before human beings existed.
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.