Interesting discussion. OP, as another person of faith, I agree entirely.
I think genderism is closer to gnosticism and some of the other 1st century ideologies which seperated the soul from the body. Their belief was that essentially the body was bad and the soul was good, and on death the two would be seperated at last and the soul enabled to pass on to purity. There was always that sense that the two were not linked in any way bar physical.
As a Christian I think the opposite. I don't believe in gendered souls, I think we are whole beings. But I respect the right of others to believe what they wish to believe, as long as it does not carry harm to others - and this is the crux of the matter when it comes to safeguarding and women's safe spaces, sport etc.
My beliefs have been torn apart, mocked, derided and hated on more times than I can count on here (I have the tiresome habit of posting on religion and philosophy threads), but I have no issue with such, despite the fact that my faith is entirely bound up with my identity and part of who I am. I could go running to MNHQ and talk about hate speech. There are times the mocking has gone further than my faith and become more personal, but while I think this is more out of order I still believe others have the right to express their beliefs of lack of. If it turned to violence and hate speech, as it does for many faith groups across the world, I'd have a right to go and ask for intervention. But generally the messages are about my beliefs, and so others should have the right to deride them as much as they please, and I stand by their right to do so.
So why then is conversing gently about the beliefs of this particular group known as hate speech or literal violence? Apparently people can't cope with reality being cited, it hurts their feelings. I'm sad they feel hurt, but in possessing a belief one must become robust and allow others to share their thoughts, without breaking down under words which don't attack them personally but simply state facts.
The other thing for me is that as a Christian I have a strong aversion to lying (cf 10 commandments). Therefore I would struggle if we came to a point of having to tell outright lies about biological sex in a situation like a courtroom, for fear of offending. What if this became enshrined in law - what if we weren't allowed to tell the truth, because reality has become so blurred? I don't want to give up telling the truth about observable reality.
I will use preferred pronouns out of respect for a person who experiences gender dysphoria. But I can see things going far further than this in terms of what the public are forbidden from saying and how that law is then upheld 