My advice is to be willing to cast aside what you believe and know, and be willing to redefine things, like PTSD, who your wife is, and who you are, on a regular basis, based upon the conflicting and new information coming at you.
What Muse wrote made me think of the book I'm currently reading "once a warrior, always a warrior". I recommend it to you. It was recommended to me on this site recently.
It does the very thing Muse suggests... Offers a view on PTSD and the people who suffer from it a different perspective. A perspective in which it doesn't paint PTSD as a life sentence of psychological problems. It explains the physiological changes in the body that happen when trauma occurs etc etc..
I recommend it to you because it's less about the symptoms and the damage they cause (which is typically the main focus) and more about why the symptoms exist in the first place. Scientifically speaking. Not the kinds of traumas that cause it.
It states that the symptoms of PTSD are the brains normal reactions to extremely stressful and abnormal situations. We all have the symptoms but at a much smaller degree and the switch back to no symptoms is so fast we barely notice we had them at all.
A person who has PTSD has the reactions on an epic scale and they stay for undetermined amounts of time.
My point here is that I have viewed my partners illness and associated behaviors as purely psychological and with that can come a feeling of helplessness for me and stigma for him.
If you replace that thinking with the idea that PTSD at its core IS a physical illness with physical, cognitive and emotional symptoms then it makes it easier to navigate. It also lessens the "your crazy" vibe we as supporters from time to time give off.
I don't know if that was helpful at all but the shift in thinking was helpful to me and if I ever get the opportunity to speak to my partner again, I look forward to sharing the info.