Her actions were not mindless: they were decisions she made in her past. There was nothing at all wrong with those decisions. She does not need to "face consequences" of any sort for what she's done in her past because she's done nothing wrong.

She doesn't need your forgiveness. In fact, you need hers because you are being a rather horrible bf.

She doesn't owe you answers about her past. As it is, you know that has had multiple partners. She's TOLD you about her past. What other details could you even want? It isn't your business.

If someone was to post up pictures of her, what you should do is this: be supportive of her. That's it. You would have zero need to "protect" your life because it wouldn't be your life that would be threatened or affected - it would be hers.

I don't understand how you can't see how your behaviour and attitude towards her is so unacceptable. If you can't get your brain to accept that she is who she is and that there is nothing wrong with her then you have no business being in a relationship with her. Give her a chance to meet someone else who will love and accept her for who she is and all she has experienced.