Looks like you’ve run across some interesting Protestants. I can only give you the Catholic POV: when we say “no salvation outside the Catholic Church”, it means (perhaps oversimplified) that if you die specifically rejecting Church teachings, you are rejecting Heaven. So if you accept the general definitions of good and evil, and you think the Ten Commandments are good guidelines for your life, it’s not for me or any other Catholic to claim that you’re not going to Heaven, if you have repentance for “sins” you commit.
But the Church doesn’t care, for example, how you translate the word “yom” in Genesis so there isn’t an insistence on accepting every syllable as infallible (I find it goofy, in fact, since the “sola scriptura” crowd uses a Bible which already has the inconvenient parts yanked out lol). The “shall not”s aren’t just an arbitrary set of no-nos, but are guides to happiness (not to be confused with pleasure). Self-restraint makes a man more mature, whether he himself is plagued by temptations of the flesh, money, food, other people’s stuff, gossip, yada yada.
Since children do best when they live in a household with a woman and a man, married to each other, it’s in the state’s best interest if there were more children being brought up in this way (hence the anti-polygamy laws, and resistance to gay marriage by conservatives).
One other thing about Christianity and capitalism: my son’s econ prof pointed out that in Christ’s time, the only way to be a rich man was on the backs of others. But under capitalism, you get rich by making other people’s lives better. Puts that “Easier for a camel to fit through the eye of a needle than a rich man to enter Heaven” into perspective, imo.
