One of the recent advantages with the newer generations cane with the internet which provided a place to create common nomenclature and symbols.

Take a kid who notices their own likes and sense of self doesn't make sense to their peers and vice versa. In my generation we just felt like an outlier, a deviant from the norm. With the internet LGBT+ community they can find these desires and behavior patterns are not unique, are not unhealthy or harmful, and there are others with like experiences.

There's also the matter that these groups are commonly marginalized much the way women and nonwhites are. Our community is united by the need to be regarded as equals by the state and by our neighbors, even when we are out (id est, who we are is known by our peers).