No, it's not that new generations have more gay and trans folks because of "left propaganda" or whatever. There were always that many of them. It's just that these days they are less afraid of admitting it for fear of being fired, ostracized, beaten or murdered.
@andy_twosticks yeah, that too. I was born at the time when it wasn't special, but I heard from older people in my family that it used to be stigmatized and left-handed people were forced to learn to use the "correct" right hand.