Khandro, a couple of points,
1. I have never declared a personal 'belief' in atheism, I just don't believe in 'god' or 'gods'. What a lot of believers cannot get into their heads because of a lifetime of brainwashing is that it is possible to live without 'belief', try it you might find it a cathartic experience.
2. Communist Russia and nazi Germany were not states based on atheism, they were based on political dogma, power and economic expediency. Their atheism was a convenient way of trying to neutralise the influence of the established church, as they saw it as subversive.
3. I am not a 'militant' atheist. Is this another expression you have coined? perhaps you could explain what it means.
4. What do you mean by the word 'trouble' in the title, do you have trouble with the concept, trouble dealing with the points raised by atheists or does it trouble you that you have gone along with all this religion malarkey to no purpose?