There are Ancient Greek plays where men are punished for raping other men, Oedipus Rex. People didn't go around raping with impunity. Again why are you equating gay rape to gay love? Plato was talking love between soldiers that transcended
platonic love.
This same man sad the earthquake in Japan was due to God purifying the population of sin. Rome fell due to a series expensive wars, over reaching into England, widespread corruption, political backstabbing, civil wars, the destruction of democracy, disproportionate slave to Roman ratios, a literal split in the nation and the Muslims pushing in the East. You couldn't have done much research
Related, in my experience gays, "opening the borders" and/or Christianity are continually blamed for Rome's fall when it much more complicated than that.