The Pilgrims left England in 1620 looking for religious freedom and because they took issue with British banks. The Pilgrims were not our founding fathers. They were also neither Christians or Mason's.
They were Puritans, which was a small offshoot group of the Church of England. Of the 21 men you mentioned, not a single one of them was born in time to have been a member of the original group of Pilgrims that left England and established any of the settlements that later became the basis for the American colonies. Also of the 21 men you mention, I was only able to find one, Thomas Paine, who was even born in England at all.
John Paul Jones was born in Scotland, and Edmund Burke in Ireland. At least 14 of the others were born and lived out their lives in the American colonies. Therefore none of them, excluding Thomas Paine of course, ever left Britain for any reason.
Additionally, there is no rule or code that states that a Freemason cannot also adhere to the beliefs of a Christian church, or any other church. The Freemasons are a fraternal organization, not a religion. There are many Mason's who not only belong to a Christian church, but also espouse the same beliefs that you mention in your question.
I'd consider it very likely that this was just as much the case during the time that our country chose to assert it's independence as it is today. Rarely does belonging to any organization interfere with a person's personal religious beliefs if they have them. Considering all of these points, I would say that you are not even that aware of the true roots and history of America that aren't hidden.
Some people just assume that what they believe in is the only truth. The founding fathers were so far apart on their religious beliefs that they knew the only way they were going to accomplish their goal of forming a new democratic republic would be to leave religion out of the picture. Being Christian is never mentioned in the constitution because our founding fathers knew if they did it would cause the experiment they called the United States of America would fail before it got started.
The bible thumping evangelists will never rest until they have undermined our country with religious dogma and destroy this wonderful system that was set up for us by men far wiser than our leaders today.
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.