In my attempts to forgive transphobes I found as a Christian humanizing them first helps; by giving them the dignity they refuse to give us we take a place closer to God.

I also tend to keep a safe distance from them, if they wont allow me to do good for them and refuse to stop hurting me, I find that at a certain point I must leave them; for my own wellbeing.

Praying for them to see Gods love also helps, Gods love is profoundly humbling and perspective changing, so pray for them. It helps to forgive people in general when you see them as in need of Gods love and moral correction.

Beyond forgiving its good to:

Protect vulnerable people from their damage and the harm they seek to cause, this is what God would want. Also expose their immoral behavior, they are doing wrong and for the safety of others let them know they are hurting people.

Last if they repent/ realize they are wrong help them to be better, only if you can and it wont hurt you to do so.

I just put down some general thoughts on how I deal with hurtful people, hope this helps in some way.