I believe that all mental illnesses need to be treated with a mixture of kindness and discipline. This is true of all mental illnesses, even trauma, though with trauma you do have to allow more time and be patient with yourself because your mind is broken and you have to process that. Your mind won’t heal overnight. In the case of trauma, you must have the discipline to not give up and to keep processing all the way to the end, and also not give up on your life. I graduated from college anyway. I play chess anyway.
You also cannot allow the traumatic person to hurt others and go off the rails - they have to stop hurting others and viewing everyone else as out to get them.
With transgender, the discipline is more obvious. No cross-gender clothes, no name changes, no hormones, no surgeries. Child Protection Services get off my property, I demand a lawyer. Once the trans people go down the road of self-destruction, Satan has them in his grip of his solution to their problem and you’ll be struggling against the ease of his appeal. Too hard. Once the road to hell has been caught off, you can have a frank conversation with your child, a kind heart to heart about how they are feeling in the body God gave them and what can be done to make them feel more comfortable in their own skin.
Because frankly, aside from homeschooling your kids or sending them to Christian school, the best antidote to this virus is to make your child feel like their biological sex isn’t going to limit them. Our society likes to categorize people based on their bodies in unhealthy ways. A healthy household will say that women can climb trees and do science and men can write novels and knit if they want (my brother learned how to knit, he’s fine) and you don’t have to change your body to be yourself. This was something I fiercely believed from childhood and that belief served me well. You adapt the activity to your body, not the other way around. This affirmation of the child’s interests is the kindness part, and also the TLC when they feel out of their skin.
But you must have the discipline to keep the poison out. Otherwise, no amount of kindness will help. That just rewards them for their self-harming and digs them into a deeper hole.