What about people who self-identify as Christian?

On the one hand, LGBT activists lobby to outlaw Christian counseling for underage teenagers who suffer from gender dysphoria. If a teenager self-identifies as transgender, we should respect their self-identification.

Indeed, LGBT activists lobby to ban therapy for adults who consent to counseling for homosexuality or gender dysphoria. 

On the other hand, here's a prominent atheist who believes people who self-identify as Christian should be involuntarily committed to undergo psychiatric treatment: 

There is perhaps no greater contribution one could make to contain and perhaps even cure faith than removing the exemption that prohibits classifying religious delusions as mental illness. The removal of religious exemptions from the DSM would enable academicians and clinicians to bring considerable resources to bear on the problem of treating faith, as well as on the ethical issues surrounding faith-based interventions. In the long term, once these treatments and this body of research is refined, results could then be used to inform public health policies designed to contain and ultimately eradicate faith. Peter Boghossian A Manual for Creating Atheists (Kindle Locations 3551-3555).