Depends on who you ask and how you ask whether Christianity is now a “majority faith” in the USA. I know, polls have shown that 9 out of 10 somehow connect themselves to Christianity. But how many even bother to darken the door of a church even at Easter or Christmas? How many could accurately quote a single verse of the bible, whether or not knowing its reference but at least being able to say which Testament it came from? “Christians with some kind of clue” probably comprise less than half.
You’re right.
“Christian” has become kind of a societal or cultural label.
It’s easy to weed out the “I’m in a garage therefore I’m a car” “Christians” from the believers.
“Can you get to heaven being a good person?”
Most people who call themselves "Christian" are products of our public schools and they know little if anything of the actual principles and beliefs of Christianity. Most Americans are products of public schools and know little if anything about the actual principles of the Constitution or the beliefs of it's founding fathers.
An ignorant, not a stupid, electorate gave us Obama. A Country dependent on an ignorant electorate cannot be successful.
My wife and I have struggled what to call the true believers to distinguish them from the larger pool of those who call themselves Christians. How about Christ Followers?