Jothar,
I have no sources, because I have no knowledge of the question at hand. I addressed Ames specifically, because she took a startling “my way or the highway” approach in her “Yiddish is just one more way to give the impression that someone or a group of people are holier than thou. It’s only an illusion of frumkeit. It’s not real.”
These fine families in Williamsbugh, New Square, the Tosh community, and others don’t speak Yiddish to give you some “impression” that they are holier than Ames. Furthermore, I would think the sweeping put-downs to large swaths of Jews without careful thought is truly reflective of “illusions of frumkeit”.
I completely agree with your assertion that “Many who speak Yiddish do so because that is the language that they’re taught in. I have no problem with that. My father knew Yiddish from his father, and I’m still disappointed that we did not speak any Yiddish at home. It is a beautiful language…” although the language is unfamiliar to me.
If one feels put-down because the family down the block speaks Yiddish, I think some introspection is needed. I’m a pretty easy-going individual, but this shocker about something as innocent as someone’s language really threw me for a loop.
I did not address the other factors you mention; Ames’ quote as seen above was not qualified by “if the individual speaks Yiddish and yells at me that I’m not speaking a heilige language…”.
Ames, we all experience occasions of “typing before thinking”, myself included. I could not let this go without some protest for tolerance, and I’m sure that your post was a passing slip.