A few years ago I read a book (actually, I've read it a few times) "Rosanna of the Amish" that was written by her son Joseph Yoder.
He wrote it to dispel the "falsehoods" surrounding the "Amish Faith."
On the surface, the book seemed all light and "god-centered." But reading it over again, you glimpse the "works" theology and the "I will make what I've done right, the church needs to punish me till I feel god has forgiven me" threads that run throughout the book.
Do they have the right idea to not lust after material goods? Yes they do.
Do they equate that with "earning their salvation?" Yes they do.
Are any of the Amish Born Again Christians? I would never make any assumptions. I would only relay the Truth to them.
I had the privilege of watching a teacher (and her husband) that I had in Junior High come forward at a Revival meeting in my hometown in the 1980's (no they were not Amish). I kept in touch with them for a number of years . . . it took about 5 years before they left the "religion" they had both grown up in . . . they finally realized that the "religion" was false and they got involved in a Born Again Fellowship.
I asked my former teacher why it took so long to make the "break" from their "religion." She said, "This is what my husband and I grew up on . . . only after we felt we could really read the Bible and ask questions to God directly (via Jesus Christ), did we realize that what we "grew up on" was not what the Bible said."
I know, if my teacher or her husband had died while still attending the church of their "religion" in those 5 years, they would have gone to be with the Lord.
Even if someone, to this day, says that they are a "Born Again Christan" I make sure by telling them the Gospel AGAIN!
The kings of the earth set themselves, and the rulers take counsel together, against the LORD, and against his anointed, Let us break their bands asunder, and cast away their cords from us.
He that sitteth in the heavens shall laugh: