Actually, there once were, are now, and probably always will be existentialists able to take a leap of faith to God.
Though I’ve yet to come upon a nihilist who believed in God, it wouldn’t surprise me at all in this “human all too human world” if they aren’t out there somewhere.
And then there are those nihilists/atheists who embrace nihilism/No God…religiously?
On the other hand, children are indoctrinated to believe many very different things about “the meaning of life”. And then, as adults, what people believe about right and wrong often revolves entirely around the particular historical and cultural communities they grew up in. Also, experientially, in terms of our individual experiences, we might live lives that are very much at odds in regard to meaning and morality.
After all, it’s not for nothing that in regard to both meaning and morality, we live in a world that has generated any number of One True Paths:
Me? “Here and now” my own understanding of value judgments revolves around the arguments I make in the OPs here:
Though, trust me, if one of the folks on their One True Path above can demonstrate to me that all of the other paths are bogus, and that their own objective morality is the real deal, watch me eagerly embrace it.
As for the pressures we are under to choose particular behaviors in any particular community, sure, if we do choose to interact with others, it is almost inevitable that conflicts over value judgments will occur.
But why yours and not theirs?
And by context, I mean a particular set of circumstances familiar to most of us in which conflicting goods have been sustained now for literally thousands of years.