The evangelical churches, like mine, are booming. It’s churches like the Episcopals and the “liberal” or progressive churches that are falling off badly, for the most part. People are looking for something to fill that God-shaped hole in their souls. When they find Him, they fill it. Churches that preach liberation theology or leftie politics can’t provide what folks want.
And thank God for that.
My father recently left a liberal social justice ELCA church to join a Gospel-based LCMS church. He tells me that he wishes that he did it a long time ago. The liberal church wasn’t even delivering the Gospel; their sermons had become rants against world hunger and spewing bile at conservatives.
The problem is that the people who have attended one church for a long time usually don’t want to try to join another, and so when they don’t get the Gospel any more, they just... leave. I don’t know why.