You're right. Some Christians seem to think that morality can only come from their god and religion, therefore anybody that doesn't believe in it is immoral. Which of course is false.
Morality is developed by environment, society, common sense, and moral reasoning skills. Not religion. And evolutionary speaking - there is reason for it.
It's an interesting question, but I think that ultimately, the morality of believers is just as "free" as the morality of atheists. We all know (or we should know) from experience that being a Christian (or a member of any other religion) is no guarantee that a person will be moral. A person chooses to act morally or not, regardless of the religious code, or lack thereof, that he or she espouses.
This is shown to an even greater extent by the fact that people leave religions or churches in exchange for another, or no religion/ church at all, in pursuit of codes of morality that better suit them. To some extent, I do think that religion causes people to adopt a "package deal" ethical code that they do not examine very closely, but I think more people adopt their own ethical codes that do not conform to the codes of their religion than care to admit it. As far as the social/ evolutionary construction of morals goes, I would argue that these two factors are the only real factors in the debate.
Religious people's morals are socially and evolutionarily constructed, whether they acknowledge it or not.
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.