While I also read the email as pragmatic, I don’t read it as kind or loving. It reads like a letter written out of fear. I don’t think your daughter should have to hide who she is to be safe, but I would also want your child to be safe.
I hope you can hold at least two truths about this letter in your head. It isn’t right to expect LGBT people to hide who they are for safety. And also, a worried family member wants their family to be safe, even if they don’t know the right way for that to happen.
The line about yearning for the mines also made me laugh, but I didn’t think there was anything else funny in the trailer. I don’t understand the level of vitriol I see either, it just looks like a bad movie ¯\(ツ)/¯