@Blackbird1234
Notbadconsidering - If you want to stop someone from having an untruthful view, you first need to find out why they think their view is truthful and you can only do that with a conversation, probably one that includes feelings. You want them to stop believing the lie, so have a conversation about the wider issue instead of refuting every single sentence. It'd be much more productive to hear them out and refute at the end of the conversation, with both parties hopefully having learned something. I guess, to me, both sides understanding the other side and listening to them fully is an important step. I understand that the lie is the conversation, so then ways to work through that need to be found and stating "that's a lie" constantly clearly isn't working.
You know, I have worked out what this entire business reminds me of.
When someone has been brainwashed by a cult, as it might be the Family Federation for World Peace and Unification, or QAnon, there is very little point in trying to talk with them about it in a reasoned way. It isn't that they won't listen, it is that it appears as if they can't. Deprogramming them is a rather specialised business, and there are people who are expert in it, but their concerned relations have very little chance without help. And anything which is not absolutely positive about their belief makes them recoil from the person who has said whatever it is, and in the case of the church member be pitying about their foolishness in not seeing the error, in the case of QAnon followers unperson and attack. (Look at the way Trump follower Alex Jones went for Trump because Trump dared to say that he thinks the covid vaccines work! He might as well have advocated eating babies.)
So with the belief-system in which it is possible for human beings to change sex -- not gender, sex. Anything which even remotely suggests this might not be a fact is totally unacceptable, anathema, and the person who has voiced it must be punished.
It's not a very pleasant cult.