Comparing being gay as like being black is a fallacy. One is a physical trait the other is an internal desire. Physical traits are not bad. Desires in the other hand can be, take an innocent example like greed.

If I made an error in judgement. God forgive me. I try to be as much innocent as possible.

I get that you are mad, the same for me when I believe someone is misguidedly talking about God on various topics without proof.

You presented the existence of gays as a proof of it being alright. How about the existence of the dislike of that trait? A contradiction.

You referenced the verse to mean mate as if it's invariable of the other gender. Wherease the word that is used is pair which denotes to gender, a male to a female. A proof of that is in this verse. (أَوۡ یُزَوِّجُهُمۡ ذُكۡرَانࣰا وَإِنَـٰثࣰاۖ ...) [Surah Ash-Shura 50] Or pairing them: males and females I recommend getting insights from this verse.

So your conclusion based on the above have no ground.

Please don't ignore the content of quran: It is well documented that no prophet or guided man/woman married the same gender.