Relative moralism is the idea that morals are situational and personal. It is becoming more prevalent every year. Years ago it took over Europe, and just recently it has become dominant in the U.S. I have a couple of fundamental problems with relative moralism, and I'll tell you why.
One is that it presumes there is no God. God is a problem for relative moralists, because God -- any God -- would give absolute morals. God sets limits and boundaries. God gives commandments. Anyone who claims to believe in both God and relative moralism is a fool -- they are completely incompatible.
Another problem I have is that relative moralism fails to form any basis for laws about moral topics. That's why so many judges today are having trouble with laws prohibiting same-sex marriage -- they presume relative moralism. And that's a problem, because relative moralism leads inevitably to "anything goes," with only vague limits, usually when actions infringe on others' rights (as long as those rights make sense in relative moralism. They won't defend the rights of the religious). Relative moralism leads inevitably to moral anarchy.
Relative moralism is the basis for the deep divide between religious Americans and others today, particularly the gay community. With belief in God and scripture, same-sex behavior and same-sex marriage are plainly, obviously wrong. (Arguments to the contrary using the Bible are nothing but phony rationalization). So are adultery, fornication, drunkenness, lying, cheating, stealing, materialism, selfishness, anger, swearing, and so forth. With relative moralism, very few behaviors are wrong, and who are you to tell me what's right or wrong, anyway? How can relative moralists say polygamy is wrong any more, for example? Who knows how low the bar will go in the future -- relative moralism has no bottom.
But with belief in God and scripture, moral boundaries are relatively plain. That makes it the clearly superior philosophy on which to base a civilization, and the proof is in American history. The proof of relative moralism's corrosiveness to civilization is what has happened in many countries and is starting in America -- we're falling, folks.
It would be unfair at this point to compare religious-based morals with communism, Nazism, Jihadism, or other extremes. Come on, you know that's not even close to a valid comparison. Extremists are their own world.