You make it sound like someone hacked him. Someone sent him a message including references to the topic and he replied. The person he sent the messages to said “wow, that’s pretty shitty” and shared it.

There are pretty minimal privacy expectations when it comes to messages you send strangers on the Internet.

I believe you. I agree he puts up one face in public that is different from his own opinions. I also agree iis opinions are bad enough for you to warrant a shit fit trying to spin it as “yes hes a transphobe but you weren’t supposed to find out”!