@Dragou Was there a part, where it said about magic pillar being unknown to the rest of the world ? Even if it is truth, she could have asked a simple chain of questions, which perhaps would be answered( they pretty much trust her and even consider making her part of royal family ): ,,What is the source of magic?", then if not answered she can stop, if answered continue with ,, What will happen if you touch it?" Those are pretty simple questions without implying anything besides simple curiosity. Asking that would perhaps give her some valuable info.
There are just too many unknow factors, so we can't have any definite answers, but i still think she should definitely not act so restrained.
By the way, that weird cult has problems with the very existence of magic, they consider it evil, that's what causes problem, not empire's worship of it, but rather empire's usage of it.