What a load of brussels sprouts! What's wrong here? The NIH site contains many songs we used to sing in school many years ago. In the children's list, the only song that mentions God is "All God's Critters (Got a Place in the Choir)- which I hadn't thought of in years and was glad to see.
I am atheist, but I can't see anything overtly religious or proselytizing in the site. As American as apple pie (ignoring its origins in the British Isles and Europe). Of course, "Amazing Grace" is in the list of Favorites, but it belongs there, right along with the classic, "The Good Ship Lollypop."
"Big Rock Candy Mountain" is in the kids' list, complete with its "lakes of gin." (Attribution to the copyright held by McClintock (we are all victims of this copyright business- we elected these lawmakers). The tale of that Australian thief who drownded himself rather than face the law is in the kids' section. The Patriotic group has the usual, but also includes "O Canada" and "The Battle of New Orleans" (Driftwood lyrics- midi OK but a little too even).
Joe may be right about some of the attributions and info, but there is mis-information in Mudcat as well. We are all prone to Fakelore because research takes time and effort. Bad spelling is typical of many websites, actually not bad in the NIH material- in any case it is a lot better than that used by many MUDCAT correspondents (including myself if I don't check my four-finger typing).
I don't like some of the versions, but neither do I like some of the "folk-processed" stuff in the DT when the original was better and should be there.
All-in-all, not too bad of a job. I can't find any Bush taint here.
Abby Sale, go back to bed and try getting up on the other side.