"[Homosexuality is] seen as one of the evidences in the decline of every empire we have seen; studies have shown it became rampant in the Persian Empire, the Greek Empire, the Roman Empire, the British Empire."
"...one of the evidences in the decline..."? I'm not even sure that sentence makes sense. But it's the first time I knew that homosexuality was "rampant" in the British Empire.
Every empire that has declined was doomed by gays? Like the Mongols, the Chinese dynasties, even the ancient Egyptians, Assyrians and Babylonians? Never heard any of them being notably gay.
In fact, of the ones she lists, only Greece was moderately accepting of homosexuality. And in Rome it could be used to defame a man, even the alleged bisexuality of one so great as Julius Caesar. ("Husband to all the wives, and wife to all the husbands" - Curio, according to Seutonius)