The father is at least partially responsible. He shouldn't be laughing, he should be distraught over how he failed as a parent.

The first sign that my son wants to be trans, we’re going to live an isolated life in the mountains for a few years till he gets his head on straight. I couldn’t just sit back and watch it happen

His mother: laughing Wait. Wait. Go back to the part where we refused to pay for his boob job! That was priceless.