If that helps you sleep at night.
I’ve never seen it used here as anything other than a “clever” code word for blacks.
If “Amish” is to be used for white trash behavior as well, that is news to me.
I’ve seen the “Amish” used to “guess” who is behind the latest terrorism incident too. It happens all the time around here to point out the obvious: a lack of culture and civility on the part of whoever is responsible for whatever. And also to point out the level of PC our society has reached (as the Amish, along with any other Christian group, would be the only ones ironically who any incident could blamed for, without knowing any details and without being politically incorrect.)
It’s a two-fer. And it’s not just to blame blacks for everything. I surely knew after reading the article these were your typical Clinton clones.