[1000 silverlings]

You should read up on Spurgeon's "Downgrade Controversy"

"One article, published anonymously in Spurgeon's monthly magazine The Sword and the Trowel, noted that every revival of true evangelical faith had been followed within a generation or two by a drift away from sound doctrine, ultimately leading to wholesale apostasy. The author likened this drifting from truth to a downhill slope, and thus labeled it "the down grade." The inroads of modernism into the church killed ninety percent of the mainline denominations within a generation of Spurgeon’s death." (From a sermon by John MacArthur)

[RegulatorCountry]

every revival of true evangelical faith had been followed within a generation or two by a drift away from sound doctrine, ultimately leading to wholesale apostasy

Moses went up the mountain, and came down to the golden calf. It's not exactly a new phenomenon.

[driftdiver]

“The inroads of modernism into the church killed ninety percent of the mainline denominations “

It wasn’t/isn’t modernism that is killing mainline denominations. It was falling away from God’s Word.

If you bore the hell out of kids it doesn’t mean they are saved. It means they leave the church as soon as they leave Mom and Dad. Some 80% of children stop attending church regularly once they have left home.