Can you ever get a Marxist/Neo-Marxist who is religious or believes in god?

No necessarily true. There was the Christian socialist movement in Europe. Some of the fundamentalist Protestant movements like the diggers and levellers were communistic.

In Latin America there is Liberation theology which is basically communist and the socialist labour party in Britain was founded by Baptists. And I would guess that the Sermon on the Mount is as communist as they come.

I see you've been reading a pile of religious propaganda. The Russian Orthodox church was seen as a partner to the czars in favoring the nobility and keeping the common people down. It's simply not true that a bunch of mean old atheists persecuted the sweet, holy Christians just because they believed in Jesus.

The conflict was economic and political, not religious.

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.