Does anyone truly support this behavior? I'm sure some folks on Tumblr do, but whatever your beliefs, this wasn't reasonable behavior. I'm sure even some of the most progressive of folks would agree.
The dad is old school, 90 something% of his peers probably wouldn't even come close to tolerating that. He said "transgender daughter" probably thinking it was the right thing, and instead of correcting him, his so-- err, I mean, daughter had a nuclear meltdown!
I guess the distinction between trans-daughter and daughter was just too dysphoric for his child.