The reason they're used is b/c they work; and they work b/c antisemitism remains a powerful social force./1
And in an antisemitic society, the easiest way to "sound right" when talking about Jews or Jewish institutions is to talk antisemitically./2
An argument which tracks one of those stereotypes will, all else equal, "ring true" in a way that an argument which avoids those stereotypes won't. Antisemitism makes it intuitively "make sense" to the listener./3
These laws have many faults, but they aren't loyalty oaths. And I imagine most who oppose them don't oppose them because they actually think they're "loyalty oaths". That language is used, rather, because it resonates./5
It's hard to imagine any other formulation that could generate that degree of antipathic resistance; hence its popularity./7
Or put differently: when speaking of Jews, antisemitism is our natural language/end