Some of the comments in this thread reflect the ignorance that exists out there about transgender.
I am now a mature 100% legal, physical, psychological and emotional woman, who started her journey at the age of 5, before anything was said about any transgender issues, when I was thinking as a girl but with a boys body. At that age I chose my female names and had a whole imaginary wardrobe of girls clothes (I was then an only child) and a real girl friend who I played girlie games with. I disliked the boys I met at my first school, and quickly realised I didn't fit in with them. At 7 I tried to take my life by walking in front of a lorry due to my inner distress and a feeling (very true in the 1950's) that no one would listen and understand me. In short "Butterfly" reflects everything I went through, but without any parental support or medical help available to me.
I grew up hating any image of me as I would not accept that what I really looked like; a boy, when I KNEW I was not. By 11, after years of practice, I was well used to raiding my mum's dressing table and using her limited cosmetics and clothes to give me the look I knew I should really have, but my war parents would not have understood. Other people classed my as being "extremely feminine", but strangely my parents just ignored it, and just treated me as odd! The late 1960's and 1970's gave me an opportunity to conform to the uni-sex look and more closely match my true Gender Identity, NOT sexuality (I am actually heterosexual women).
And so my misery went on until my 40's, with many suicide attempts, when at last opportunities arose for me to fully transition.
So, without rabbiting on, I can claim to be fully qualified to give an educated view point on this subject, and I am delighted that "Butterfly" has been aired and potentially given many children hope and a release from a 'prison cell' that life is when you are trapped in the wrong body. It is no joke, and the more people, especially those who express such ignorant and upsetting, know about a very real condition and can help those with it, the better.
Remember people generally are not just 'Male' or 'Female', but many shades on a huge spectrum of identity, well before you get on the subject of sexuality. Those who still believe that people are generally "normal" or peculiar / strange / inflicted / a nutter, belong in an age of long ago. God made us all different, so celebrate it and positively help those who require it, such as transgender children. That includes blocking puberty as soon as it is realised the child has Gender Dysphoria, and not letting that child go through the misery I had to!