The decline of evangelical Christians.

[Brian37]

You better hope not. Russia is a far more conservative country that America and is a majority Russian Orthodox Christian. Run by a former KGB thug, who is a Christian himself.

Russia may be far more conservative, but it's far less religious than America. 43% of Russians are "nones", which is more than Russian Orthodox Christians, in fact the level of disbelief is far more comparable to the Scandinavian countries than America.

"Christianity is the only moral force"?  No that is your tribalism speaking. I am quite sure if you ask enough Muslims or Jews or Buddhists, they'd argue the same. And that is pretty narcissistic of a claim on a planet of 7 billion. 

Well, I was referring to America, were these groups are marginal, but I'll revise it to Judeo-Christianity is the only moral force. Absent of it there is no such thing as a moral force in America.

Ok, lets say suddenly all 7 billion humans suddenly believed in a magic baby with super powers? Do you think even then, there would only be one sect of Christianity and never any disputes or wars between Christians, and prisons wouldn't exist at all? Sorry, but past history proves there is no part of the globe, in any religion of the world, that has not had points of internal conflicts between the sub sects, not just with other religions.

History proves, that if there's enough differences between any group, there's bound to be conflicts within them, and given particular conditions this can turn into violence. Countries that have been immune to this, have been able to retain a high level of homogeny, and often have a hard time when foreigners and others are introduced into their populations.

Some are able to work those differences out, and other's are still struggling to do so.

Secondly most christians seem to be able to get along with other christians from different christian sects pretty well, even if they have theological differences. There is more conflict between liberals and conservatives, feminist and non-feminist, etc... than there is between christian sects in America.

Western pluralism and checks on power happened in spite of religion, not because of it.

If America were to suddenly get rid of the constitution, the first people oppressed would be non Christians, but after a while the sub sects of Christianity would go back to the same barbaric tribalism Europe had prior to the age of Enlightenment. 

And sorry, even after the ink was dry on the Constitution, we still did shitty things to Native Americans, we still owned slaves, we denied women the right to vote,  and even today our right wing is having a hard time treating LGBT as equals. 

I don't think you want to live in a world without western secular government. I am sorry someone sold you the BS that "secular" means godless, when the truth is it merely means "neutral, neither for or against, but treat equally'.

Um no, there has been plenty of cruelty between Catholics and Protestants and Baptists ect ect in it's history. 

Checks on power and concepts like Jefferson's wall, are why we don't look like Saudi Arabia or Iran.