Muslims, Where do we find that Muhammad was the last prophet of God,other than his own words?

No, there "is" sic not other prophets like that.

Sure. Moses (peace be upon him), for example, commanded the Children of Israel to enter the Holy Land and fight against the people that had inhabited it. (However, they being disobedient rebelled against him).

Another example is, Jesus will return and use a spear to kill Al-Masih Ad-Dajjal (False Messiah; "anti-Christ). Etc. You need to accept the Prophets as they were.

Not invent fake images of them being pacifists.

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.