A few thoughts.
Progressive views do not equate wanting or accepting of a female spouse, you can no more expect her sexual attraction to change for her then, then you could expect a gay or lesbians sexual attraction to change. They are two entirely different issues, so yes a person can be supportive of the LGBT community and not be attracted to a Transgender woman.
I understand your pain, I experienced it in my first marriage, but you need to understand what your coming out has done to her world. You revealed a ten plus year secret to her, a secret that sets in motion an endless set of questions, her sexuality, what did she do wrong, if you hid this what else are you hiding, can she trust you, the list goes on; there is no security in her world now, no rock she can lean on, up is down and down is up.
You both should also find local support groups, online is a help, but trust me you both are going need people in your area that understand what you are going through.
I can only tell you with assurance one thing, you can't fix the damage created by coming out to her, she needs a therapist and you both will need sessions together. Most marriages don't survive this and honestly it has little to do with not being able to accept you, or even a lack of love, but one of her needs. In the end, you both are who you are and nothing can alter that.
I wish I could be more encouraging, I can only say that you will get through this, it's not be easy, it's probably not going to turn out the way you want it, but you will get through it and be the better for it in the end.
