I think separation of church and state is beneficial for both.
Jesus didn't live in a Christ centered nation and didn't seem to spend a bit of time worrying about that. I think Christians are absolutely damaging their witness by trying to convert people by force through the government, rather than by love for their neighbor, the broken, the vulnerable. A lot of Christian conservatives love to say trans is a mental illness, which if they really believe that is true, hard to believe Jesus would treat them like they do.