Until 2014 it was properly labeled "Gender Identity Disorder." Then it was changed to "Gender Dysphoria".

It is a delusionary psychosis; a mental illness. Pretending it is normal, even having it codified by the US Supreme Court as a legitimate sexual identity, was and is one of the most spectacularly successful worldwide gaslighting events in history. You actually have otherwise normal people calling obvious sissy males "women" and thinking they're virtuous for affirming this blatant lie.