Pretty sure he was jokingTo say vinegar is racist is sooooo fooking stupid. Just because it may sound like some other word. Look up the etymology of the word. It really means sour wine. How is it racist if I tell you to fook off, you sour wine? That's political correctness out of control.
Here in lies the problem thoughtMy thought process is:
The peroxide turns the dried urine salts back into it's liquid acid state. When the magic juice + ammonia is applied it, (like you said in accelerating the peroxide), in whatever is still active while it helps in vanquishing the stains and dissolving the grease as it breaks down the organic compounds in the urine