1,500 pages of Homosexuality of Men & Women spread across the
tomes that have been sitting on my desk for an embarrassingly long time.

You own it?! How?? I've seen it once in a while for sale at an antiquarian/specialist seller, generally with an asking price of at least a grand USD. In my region there is one copy at a public library and one copy in a university library. They aren't available for loan. I am discussing the English translation; if you are german-reader then I think it is somewhat easier to obtain (maybe?) but still a find. You don't need to answer any of that of course. The German version would at least be public domain (so cheap imprints are possible) whereas the English translation is so recent that the translator is still alive (and actively translating further works, thanks to him for his service) and the book being out of print and I doubt it sold many copies, very difficult to find.

Whether you should read it or not, I guess depends on what are your interests. It's for sure worth flipping through especially if you have on paper. I found it very provocative, to learn that "new" ideas are not so new. And that they were found by a totally different route than the modern incarnations. To me, all there is in there is questions questions questions. The path from there to here is quite mysterious and the explanations so far available are not satisfying to me.

One question, how this book came to be published. Like many things about this man, the historical work may not have been done yet (or I may only be unaware of it). Why is it 1500 pages long? It does not exactly warrant that many pages. To the extent that reading it does provoke questions like, "is this this book meant to be read?". Or was it produced as a decoration? Who actually bought it, which parts did they read, if any? I am not clear if the book itself had much influence, or the many other activities of Hirschfeld and those with whom he worked in various committees and groups were more important.

My issue isn't with Hirschfeld's work but rather with the terms in their modern form which have been almost completely stripped of all the detail you relayed.

Yeah it sucks what has been done! You were articulating a very broad consensus understanding, shared between a lot of people otherwise apparently at odds. Which has started to come away the past 10 or 20 years. I hope to learn more about the whole historical trajectory of these concepts.

How did the false history come to be so thoroughly accepted by everyone? This book of Gabriel Rockhill, Who Paid the Pipers of Western Marxism?, is really interesting and I would like to know how these two stories fit together. Even though it will likely not emerge to be at all complimentary overall to Hirschfeld, who's politics are like much else, not enough investigated or described, and not by people with the relevant expertise to evaluate. It seems that all the recent work on him is very liberal in origin, and kind of mindlessly positive (like what I wrote). I don't think this analysis is definitive. So one reason I would like for you to peek into Homosexuality is because I think the topic is desperate for marxist/communist perspective (which I assume you have). But there is lots of other source material to work from (and likely even more to be found for the enterprising).

Who knew that cracking your egg on 420chan's /cd/ would be so bad for you!

Sounds like it worked out just fine.