The problem in 'communist' Russia and China, as well as certain religious states, is not belief or the lack thereof.
The problem is dogmatism.
Once you start thinking that one idea is true no matter what and hush all dissenting voices; that's when you run into trouble.
Our societies have evolved a lot in the last hundred years, not to mention the last two thousand, but a dogmatic society is essentially in stasis and cannot evolve, which means that it is doomed to fail.
I try to be respectful to the people I meet.
Not so when it comes to ideas.
Ideas should be criticised and attacked from all angles, and if they fail to stand up to scrutiny, they should perish like the failures they are.
And for those who think faith is a requirement for being moral:
I'll be happy to compare my country of birth, Norway, with ANY religiously run country in the world, on anything we can find statistics and facts for, be it healthcare, education, crime and violence, freedom of speech, sex equality or whatever you like.
And to the OP: The Vatican State is not a real country.