*ElaineFuchs
Toomanyradishes
I would leave my husband if he was trans, but that doesnt make me transphobic and its idiotic to suggest it would. I fell in love with my husband, a man, with certain personality traits and physical characteristics. If my husband decided he was in fact a transwoman not only would my entire marriage be based on a lie which I would find very traumatising and hard to forgive, he would be rejecting the personality and charcter traits and physical characteristics that I found appealing.
There is no other senario where a partener finds out their entire relatioship is based on a sham and they have been lied to and is expected to just grit their teeth, smile sweetly and be fine with it.
I know first hand several relationships in which this has happened without any issue at all. Nobody thought that the relationship was based on a sham to my knowledge.
You are of course free to end a relationship if someone's personality changes or if their physical attributes change; I don't think that's inherently transphobic.*
So its simultaneously exactly the same to be married to a transwoman as it is to be married to a man, and they will look and act exactly the same, but transwomen are not men 
Look either they are different, aka transwomen are women, and therefore its not transphobic to be upset and struggle with the transition as a wife, or transwomen are in fact men and its exactly the same to be married to them but it can be both.
If neither their personality or their physical attributes change then where is the fucking transition?
If my husband came out as gay i reserve the right to be upset and not be 'fine' and thats not homophobic, its actually quite natural because your whole world changes
If my husband came out as trans I reserve the right to be upset and not be 'fine' and thats not transphobic, its actually quite natural because your whole world changes
If you are in a partnership your actions have an impact on your partner. It doesnt mean that you shouldnt do or be something ypu feel strongly in but it is selfish to refuse to acknowledge the impact on your partner