Unlike many "main line" Protestant denominations, the Catholic Church has continued to grow in the US. And conservative, tradition-oriented parishes are doing better than the parishes that embraced the 1960's and 70s psychobabble.
There are two things in America society that help distort the culture and turn things in a secular, twisted direction: the liberal media and the statist/socialist/secular humanist monopoly on public education. The internet and Cable television are eroding the liberal monopoly on the media. Real school choice (100% for ALL Americans) would end the NEA's liberal death grip on the young minds of America.
But it is those two areas which obscure America's cultural orientation. Conservative Protestants and Catholics have remained Christian. With much agitation and opposition from the courts, the NEA, the DNC, Hollywood, and the New York media elites ( a tiny minority of American society totally lacking in integrity or moral vision). Get rid of those two monopolies and you have a GREAT Christian nation.