Queen Eye for the Straight Guy came out in 2003. That's 17 years ago.
Which was a year before gay marriage was legal in the USA. Queer eye is a show that was showcasing something that was not commonplace at the time. I don't think it's an argument that being gay was fashionable in the early 2000's unless you mean fashionable in the most literal way.
https://worldpopulationreview.com/countries/countries-where-...
Calling being Gay fashionable is certainly a mindset that could only be developed in the last 5~ years in the USA or a very select few other countries.