In the case of trans people they go to a doctor and willingly get certified as mentally ill in order to get the meds and surgeries. They sign the paper that says they are mentally ill.
Real Christians didn't. The ones claiming to be Christians in the middle and late catholic church were "forcing" people to be Christian or excommunicating people out of the church, if you read the bible though, no human can take your salvation and the process for kicking someone out of the church requires bring it to them in private, then in front of the congregation, then in front of the pastor and only then can they be barred from that particular church, not the entire religion. Kings would kill people that weren't Christian in God's name, as if anything anyone can do can claim God's name on it.