https://www.amazon.com/Coming-Apart-State-America-1960-2010/...
https://www.amazon.com/Coming-Apart-State-America-1960-2010/...
Insofar as the first part is true, those broadly held, super-ecumenical values aren't what belief is eroding in; the theological, cosmological, and eschatological beliefs and associated ritual is what people are abandoning, not values that are so broad as to be both foundational to “American civilization” (itself something of a parochial myth) and validly described as “Judeo-Christian”.
That the flow is in all directions between all three Abrahamic faiths (and not just those) is fairly firmly historically established.
George Washington's Farewell Address https://en.wikipedia.org/wiki/George_Washington%27s_Farewell...
Suffice it to say, Murray's version of the "core of American civilization" is something I'd be very happy to see disintegrate. I doubt I'm the only one.
The Southern Poverty Law Center, with very good reason, has classified him a a White Nationalist https://www.splcenter.org/fighting-hate/extremist-files/indi...
The writings that I've read by him (which I admit, isn't much) can be summarized as "minorities are genetically inferior because... science." (and the subtext is a lot nastier)
I'll agree I want no part of whatever Charles Murray's vision of America should be. I also wouldn't classify any of his writings as "incredibly important," his writings on race are largely discredited.