To want religion to be "civilized" is to demand that religion cease to be religious.
Religion is not a promoter of any particular governmental form at all. It promotes a system of moral law. Governments do very well to espouse this moral law as the foundation of their system of justice. And when they don't we see the effects well enough.
History tells the tale. Go look. Go where sovereign nations repudiated God's law, and took up a law formulated by human genius instead.
It is the fate of such regimes to bleed and die. Again, check history in this regard.
In short, please do your homework, OldSpice!
Which may be difficult for you, in the case that your atheism makes you blind to aspects of reality that are vitally alive to other human persons. Like me.
Hmm, interesting revision.
I mean, the popes from the old days weren't merely indulging in encouraging prostitution and other sins by way of monetary payments for "atonement", and empire-building by allotting regions of the planet to one or the other subjugated states. [Sarcasm!]