Alright let's ignore how every society that openly accepts homosexuality experiences moral degeneracy and societal degradation, eventually leading either to collapse or a political and social revolution with global consequences. Ancient Greece and Rome are the easy ones, so let's look at the Weimar Republic and Nazi Germany.

As I pointed out in another comment, VERY similar to America today. Hyper inflation, open pedophilia, transgenderism (the very first sex change surgery was performed in Weimar Berlin), oligarchic politicians who force evil agendas onto their people for their own benefit. And what was the VERY FIRST agenda that started all of this in the Weimar Republic? Forced acceptance of open homosexuality.

I probably don't have to explain the consequences of all of this, given the political and social backlash resulted in WW II.