Outside of a few million Evangelical Boomers, everyone has given up on the "America is a Christian nation" meme at this point.
>most people have become atheist/pagan/muslim/non-practicing Christian
>an overwhelming number of Millennials and Gen X are heavily tattooed, dressed immodestly, swear profusely, use drugs regularly, boast to strangers about their sex lives, sleep with and sodomize strangers regularly, move into homes with partners they've only known for a few weeks, have multiple marriages and numerous sexual partners throughout their lifetimes, and otherwise live like pagans
>nearly all women for the last 60+ years have dressed and acted like men, while treating men terribly and putting animals on a pedestal
>talmudic/pagan practices have thrived in america while christian practices (e.g. Bible readings in public schools) are scrutinized and outlawed
>the beacon of american culture, hollywood, is a talmudist's wet dream (jews preying on gentile women and children with little or no consequence, Christianity mocked and ridiculed at every turn, subversion of the greater gentile population, etc.)
>most forms of porn are perfectly legal and generally free of charge
>public schools brainwashing children from the age of five onwards into believing that God does not exist, we all evolved from primates, gender isn't binary, etc., and teachings kids from the age of ten onwards how to have sex
>our pagan culture portrays virginity as bad and promiscuity as good, drug use as fun and abstinence as lame, mixed marriages as desirable and same-faith marriages as problematic, and otherwise twists falsehoods into virtues and vice versa
I could go on. Like I said, it's pretty much Boomers who don't have the faintest idea of what a Christian nation is making that ridiculous claim. The closest any American has ever come to living in a Christian nation is if they immigrated from one or if they lived in a Catholic/Orthodox neighborhood in the early-to-mid 20th century and assumed all of America was like that. Otherwise, America has always been a bastion of liberalism governed by those who reject the authority of Christ and His Church.