Hey Dan

There's so much going on here huh? The bottom line is that it sounds like you have to do all the compromising. I am not religious, but I respect other's faith - but saying that I wouldnt date someone who's actively religious because it would be too much of a fundamental difference.
I do wonder how much she is willing to compromise - she seems to insist on a lot. Have you spoken about meeting half-way? For example, my partner doesnt smoke, and he hates it, yet he knew I smoked sometimes when we hooked up, and he accepts it as a part of me, even though its a really horrible, smelly part of me. I also have issues with the banning of porn - Personally speaking as a girl, I dont mind my fella looking at porn. Tbh, I just think its part of the norm - as long as it doesnt take over! Page 3 in the sun is really mild too huh? I do think she may have more insecurities other than porn too.

Staying with her is entirely up to you, just be honest with yourself as to your ability to live life her way. Did you ever sort out the reason you broke up in the first place too? Did she tell you why she changed her mind over you when you started seeing another woman? I would wonder if you're still in love with the old her too, a memory. I hope you can find an answer for both of you, as she deserves someone who's into her 100% too.