As I recall, they indicated they agreed with her.
They have stood beside her on this entire thing (remember the infamous Entertainment Weekly cover a few years back?), and IIRC it's the other two (who are sisters) that "own" the band, with Fat-alie merely being an employee. If that's the case, they could have thrown her overboard at any time and continued with a different lead singer, if they'd wanted to. It certainly would have been the correct business move, regardless of the political ramifications.
As such, I think it's safe to say they're all in on this together.
When the incident first occured, Bruce Robison who is married to Emily Robison (the wall eye chick), also a country entertainer, hada message up on his website saying that he didnt agree with Natalie. It was up for about 3 days, maybe a week, and was taken down never to return. Since then they claim they agree with natalie.