I understand that a conflict as broad as the Taiping Rebellion involved people of many beliefs fighting for various reasons. However assume the perspective of the 'true believer' in the Taiping army. Do we have an idea of what they believed? What motivated them? What sort of understanding might they have of Christianity? What does their religious worldview look like, and how is it likely influencing their actions?
Almost all of the source material on Taiping religion is from an ideal perspective. That is to say that our main points of reference are, broadly speaking, prescriptive texts describing what Taiping adherents should believe, and how they should behave, rather than descriptive sources discussing what they did. Our other major points of reference are either condemnatory Qing texts or the odd European report, almost all of which have a strong moralising position against – or occasionally for – the Taiping, and so have to be very carefully approached to find any worthwhile information on the extent of sincerity in Taiping belief. So while we can give a reasonable description of what Taiping dogma was, we can't do the same to assess how far people bought into it. I've discussed various aspects of your question in these past answers:
However, if there's anything I've missed, or if you have any follow-up questions, however niche or specific, do feel free to ask them and I'll be happy to try and help.