That remains to be seen, doesn't it. According to many transgender support groups, and many transgender people, you most definitely would be.
I have to agree with those groups to be honest. Maybe that is my programming coming through that I have been told repeatedly that if someone says they are trans, I must believe them.
Yet, you don't believe this and you reject my statement that your attitude in this instance is transphobic.
I personally also find it cruel to expect any person to have to medically change themselves to fit your personal definition of a 'transgender' person.