with regard to the UN versus religion, is motive and opportunity. The UN has no "motive" or reason at the moment.
No they don't. And neither do governments. No government in it's right mind would try to do away with religion. Religion provides the checks and balances for members of a society who lack the self awareness to regulate themselves.
If you take away religion, these individuals will go haywire because they will feel they are accountable to nothing and nobody. Governments don't want a society which is out of control. They rather have a society who thinks there is a man in the sky with a grey beard who will punish you if you misbehave.