"Apparently we live in a world where identifying as something means it's true."
That's apparent to you? Either you are not paying attention, you have quite drastically misunderstood a concept or I guess you could be completely deluded.
Not a big stretch to change your mind. Regardless of what he identifies as, he'll be President on January 5th through the 20th, also regardless of what happens in various court challenges, he could be president beyond that.