The US years ago had limited yearly immigration. This was so new people would assimilate to American culture. Now, immigrants are allowed to enter in masses.
When this happens, they don't assimilate, they bring their own cultures with them and group up together. And many groups don't stand with America, but try to instill their values on the country. It's not just Muslims either.
They can practice Sharia customs in their households and mosque if they want to. Sharia has been evolving to fit in modern society among moderate Muslims living in US and Europe.
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.