Thank you for all of the replies. It is really appreciated. To the comment about my friend not being a real friend, I don't believe that is correct. I only came out to my wife last week, and besides her only my therapist knows I am transgender. Dealing with misinformation and misunderstanding is going to be the new normal for me and I want to be well equipped. I am fully convinced of my own life experience that being transgender is not simply "being unhappy" as this ignorant author postulates, but this is the kind of argument I am realizing I will run into over and over as time goes by.
I come from a very conservative background and I and most of my friends were raised to have very narrow views on topics like gender. I don't count my friends as enemies just because they can't understand. I would rather try my best to overcome their ignorance with truth and hopefully win them over.
The funny thing is, the friend that posted this is someone I have long suspected to have similar struggles with trans identity. I can't prove it, and won't try to, but I believe he has been suppressing many of the same feelings that I am finally addressing. I sometimes think some of the people who most vigorously promote things like this are folks who are throwing up smokescreen to hide their own insecurities.