Do you also have a problem with the content, Paul? I merely made a gratuitous supposition in the face of the gratuitous assertions of others. Not sure how you get “namecalling” out of that.
if you take the city of Roma, then no -- gays were more rampant a few centuries earlier -- read about Elagabulus the Roman emperor in 218 AD who had a blonde slace named Hierocles (Gallic probably from modern day Turkey) whom he called his husband, He was described as having been "delighted to be called the mistress, the wife, the Queen of Hierocles" and was said to have offered vast sums of money to the physician who could equip him with female genitalia (Cassius)
This guy did lead to the decline before Domitian, but this was in 218-222 AD, 200+ years before the city fell to Roman-trained, Alaric in 410 and then Odoacer, a Roman cultured Germanic defeated Romulus Augustus in 476 AD. This was not due to homosexuality.