Matthew 19:4-6, which you cite, does not specifically define marriage as restricted exclusively to the union of one man and one woman.<quoted text>[deleted for space]
While I agree with you that each society needs to make its laws based on what its people believe are best and I’m willing to assume, for the sake of discussion, that up to this point our society has been guided primarily by Christian values, I believe your conclusion that as a result we have become the most powerful, prosperous nation on earth to be unwarranted. Your conclusion does not necessarily follow from your premises.
Likewise, citing certain infectious diseases, including HIV, to be present-day evidence of homosexuality as an abomination, is equally invalid — and for the same faulty reasoning. You might more properly conclude that sexual relationships among all people to be an abomination since certain infectious diseases, including HIV, are a risk factor for all people.
Finally, I certainly agree with you wholeheartedly that our behaviors, individually and as a society, have consequences, but you have nothing convincing about homosexuality leading to negative consequences. I appreciate that you understand the bible wasn’t written by god and that it is not the ultimate internally contradictory rule book for mankind to follow. It is a recorded history (and perhaps pre-Christian mythology) resource laced with a prevailing code of ethics from the era of its origin.
As I said, I’m no biblical authority, so I defer to your expertise, but not your interpretation based on faulty reasoning. Thanks for your response.