What we see in the US is
Oligarchy:
Study: US is an oligarchy, not a democracy
People are discontented because they are being exploited.
The treasure of the richest nation on Earth has become almost entirely concentrated in the hands of a very few individuals and corporations. The poor are poorer, and the Middle Class is disintegrating.
This is all by design, initiated by the Powell Memo [
The Powell Memo: A Call-to-Arms for Corporations | BillMoyers.com ], Which was later implemented by Reagan's Neoliberal revolution ("trickle-down" economics).
The right-wing Corporatists, and their GOP lackeys, have successfully shifted the popular blame for the economic and social decline to the "Radical Leftists."
I wouldn't say it's due to secularism. It's due more to corporatism; to Neoliberal Capitalism.
Religion is, potentially, just as exploitative, and is, today, being exploited by the GOP to divert the public from the real source of their discontent.