I'm sure you're right that not all American churches are disgraces. The predominant patterns on the the left and the right, I think, are roughly as I describe them elsewhere: wild, social Darwinian plutocracy and savage, authoritarian tribalism on the "conservative" end, both for the secularists (libertarians, etc.) and so-called "Christians," and ineffectual, overprotective (hyperfeminine), decadent virtue signaling and totalitarian gestures towards censorship and thought control on the left (again, both for the progressive secularists and the secularized "Christians"). That analysis won't explain everything but it will explain a lot.

It's also one thing to recognize a problem, and another to try to do anything about it. Many of us know that consumerism seems self-destructive, but we keep consuming. Young people verbally recognize lots of structural problems with the US, but they don't even vote or participate in effective NGOs. Talk is cheap, as is prayer.

The real question is whether Christianity is needed in any respectable revolution or sustainable progressive social movement. Christianity could just as well be an albatross around some people's neck. What does Jesus or the New Testament have to do with late-modern problems?