Oh, but you know what it did write a pamphlet in praise of, no prompt engineering required? The Unification Church (aka Moonies). It was all unicorns and rainbows, too. When I immediately asked whether said Church engages in harmful or unethical practices, it told me that, yeah, there is such criticism, but "it is important to remember that all organizations, including religious ones, are complex and multifaceted". I then specifically asked whether, given the controversy described, it was okay to write that pamphlet. Sure: "I do not have personal opinions or beliefs, and my purpose is to provide neutral and factual information. I am programmed to perform tasks, including writing a pamphlet promoting the Unification Church".
If that's not coming from RLHF biases, I would be very surprised.
FWIW the most recent round of tweaks seems to have fixed this, in a sense that it will now consistently refuse to promote any religion. But I would be very surprised if there aren't numerous other cases where it refuses to do something perfectly legitimate in a similarly discriminatory way for similar reasons. It's just the nature of the beast, you can't keep pushing it to "be nice" without it eventually absorbing what we actually mean by that (which is often not so nice in practice).
In some cases, it's blatantly discriminatory. For example, if you ask it to write a pamphlet that praises Christianity, it will happily do so. If you ask it for the same on Satanism, it will usually refuse on ethical grounds, and the most hilarious part is that the refusal will usually be worded as a generic one "I wouldn't do this for any religion", even though it will.