You are aware that dates can be changed on Facebook for each post, right? You can add a new post today (or whenever) & backdate it & it will look like you posted it for whatever date you choose.
Info here:
https://www.facebook.com/help?faq=301591769889792
I don't recall seeing any of the post referencing religion the first time I saw her "new" Facebook. Her wall has been edited. She has an older one besides this "newer".
Not trying to defend MCM in anyway and I have no idea what her religious beliefs are or when they started, but when it comes to FB, I have to defend my observations. I own a business that provides FB apps and I have an extremely intimate understanding of how FB works and what you can and cannot do.
You can only edit dates of posts if your account was upgraded to the Timeline version, which hers has not been upgraded. Second, if you edit a date, it doesn't change the date of the post, it simply places it in the right location on your timeline, but it borders it with a different border.
Also no one has any control over the datetime stamps of comments and her religious posts in March have comments with March dates.