Holy cow, I do believe they're serious

Sadly, it's serious.  They mean this.  It's not satire.

I fear for this country.

(Except I will say this--there is a good possibility, statistically-speaking, that the people singing this don't regularly, reliably vote.  Hopefully they won't, still, should "the Quitter" run for the presidency.  Here's hoping.)

You realize, too, right? that this "church", wherever and whosever it is, should have their tax-exempt status revoked, too, don't you?