By “vanished from the mainstream” you mean their 2003 album still went 6x platinum, and then their 2007 album went 2x platinum and won 5 Grammys?

Yeah, you unexpectedly demonstrated how effective the ban was. After being blacklisted from thousands of radio stations (including ClearChannel, one of the biggest), their album sales plummeted. Except in Canada.

Also, their next studio album came 14 years (!!!) after Taking The Long Way.

Is this sarcasm or a window into a different side of American culture?

In my circles the Dixie Chicks rebounded from the Bush backlash and had their biggest pop hit ever in response to it ("Not Ready to Make Nice"); they became more respected in the wake of it than they ever had been.

And the attempt to cancel France. Going so far to rename french fries "freedom fries".

All because France thought going to war with Iraq in 2003 was a bad idea.

The “freedom fry” troupe can actually be traced back even farther to WWI

If you’ve ever wondered why “frankfurters” are now called “hot dogs” or why “sauerkraut” was called “liberty cabbage” for a hot minute, it’s because of anti-German sentiment in the US [1]

[1] https://www.hppr.org/post/freedom-fries-liberty-cabbage-myth

Not just the US - Berlin, Ontario was renamed to Kitchener (after British WWI general Lord Kitchener) in 1916.

I thought this was a joke.

It isn't.

Well, the "Dixie Chicks" have been cancelled again, and now are just "The Chicks".