Wicked yes, planning to change essential church truths is another matter all together.
I would need to hear this from a priest who was versed in church history and theology before I would believe it. I am sure it is a comfort to your MIL to have such a belief, but that doesn’t make it legit.
and Ti, your MIL believes the democrats, so that has done a great deal of damage to her credibility in my eyes, LOL!