Yeah, those can be a pain. You have the round threaded steel retainer I presume. I was able to get the glass out with those posts attached, but, it wasn't easy. IIRC you had to work the glass toward the rear of the door while raising the rear edge up and out through a wider spot in the door shell above the latch.....after all the other internals were removed of course. Once the glass was out, you can soak that retainer in WD40 and grab it easier with some small, curved-jawed vice grips with sharp teeth.
