Can't really blame America for this, it's pretty much existed for most of history, with various cultures having their own way of responding to it, from the indifference of the Greeks to the outright violent response of Islam.
I would however blame America for the toxic femininity the world is experiencing right now. Basically this, but on a planet-wide level:
https://www.youtube.com/watch?v=iMucmRlPZK0When you read the Bible you will see that Homosexuality has been there for a very long time, look at what happened to Sodom and Gomorrah because they wanted to carnally know the Angel's of the Lord. This has nothing to do with America but because everyone can seemingly do what they want there. Most people say they are gay and proceed to do it thought most of them are mostly experimenting.
I believe there were people disputing a certain passage, saying that it's more a prohibition on pederasty rather than homosexuality. Regardless, if salvation is through a personal relationship with God, then let people do what they want since, in theory, it should only be them that will suffer the consequences in the afterlife, right?