Thank you. I read recently that a holocaust survivor forgave the Nazis who killed her family and I feel ashamed that I cannot forgive my parents for what, in the grand scheme of things, compared to what that lady had been through, is not as serious.
OP, I've tried to set down some thoughts. They are all about the longer term. If right now you need a period of NC to feel better, there is absolutely nothing wrong with that - I don't want you to think that anything I say is anything more than some musings on the deep future. 
First of all, please don't beat yourself up that you don't feel forgiveness right now. It does not make you a bad person or a lesser person AT ALL. There is no 'ought' about forgiving - feeling that you 'should' feel one way, but you don't only makes it all a lot worse.
Also, you can't compare one kind of pain with another - you can't quantify it with a number - because after a certain point it just goes to infinity. And I think your pain is there, and so is that of holocaust survivors.
And sometimes I think the struggle to forgive someone is just too difficult to be worth it. If you can't do it without jeopardising your mental or physical health, then it is best to cut the relationship off instead (remembering that no decision is for all time). There are some wounds that just are too deep.
If you do decide to go down that road, forgiveness is a very, very long process and an extremely arduous one to achieve, and then to maintain (and it does need constant maintenance, because as life circumstances change, new wellsprings of pain can spring up from the past). I actually think it's a very profound thing to forgive, and far more complicated in its dynamics than we really have modern language for - it's not just a reconciliation with the past and with circumstances, but a kind of self-reconciliation too. A kind of self care if you like - the only way of really laying aside the anger and pain once and for all so that the past no longer colours everything in the present for ourselves, not for others.
One of the things about it is that I don't think you can achieve it if you're trapped mentally in the old family dynamics. You need to be able to stand apart. You don't need to be like your parents, to interact with the world as they do, or to agree with their decisions to love them in your own way and with your eyes open to their limitations and failings (and they do sound pretty large in the case of your parents). And part of that love can be accepting that the relationship is what it is - you're not going to change them. Acceptance looked at in this way sounds very passive, but when you turn it around, it also means that you, too, have an absolute right to be the person you are, independently of their approval, disapproval, or indifference. You can push away the scapegoating, and reject it for what it is - a false, sick way of diminishing you that has no bearing on reality. That also means that the relationship won't necessarily be symmetrical: in fact, it's likely to be quite one-sided if one of you is independent and the other embroiled in family dynamics. I would put it to you that it is this independence within yourself that you need, and that the issue of revealing the abuse to your family is a kind of separate one. (Very important, but separate).
I hope you don't mind me writing down a couple of things that I've been thinking about abuse itself, based on my own experience at the hands of a mother who was really quite mentally ill and thus not capable of taking full responsibility for what she did. I think when it comes to abuse like that which you have sadly suffered, you are facing an act which should never, ever happen - something so terrible and so infinitely wrong that it stretches the limits of language and of emotion too. One of the difficult things about this kind of abuse is that we fall back on more familiar narratives to understand it, hence our need to identify criminals who prey on children. But in a case where abuse is committed by someone who isn't capable of taking full responsibility, in secret from all other members of the family, then who is to blame? At whom should your rage be directed?
It would be very, very easy in such circumstances to start blaming yourself, which of course is entirely, completely and absolutely wrong though sadly very normal, especially for children in these situations. If you have been scapegoated by family, then you have that self-blaming narrative ready-made to pick up, even if those scapegoating you are completely and utterly ignorant of the abuse. So feeling rage at your parents and their tendency to scapegoat you (which is a lesser kind of abuse in its own right) may be a kind of substitute for rage at the greater abuse that you have suffered, where there is no clearly identifiable, adult perpetrator - no-one to blame or lock up - in spite of the fact that there is still the same pain and the same struggle to deal with the consequences.
Speaking entirely personally now, I spent years and years struggling to make my situation more black and white than it was, to blame my mother's actions and my father's passivity, to 'confront' them and bring the truth to light and rage at them for what happened. Actually, it was only in my 30s that I could face the fact that it was a morally grey situation, a kind of moral vacuum created by a very unhealthy family dynamic and a complete lack of institutional and social support. Eventually it became surprisingly comforting and calming to see it in a more rounded way.