History has a way of miscasting what actually happened, some get marginalised, erased, misrepresented and so on. Especially when the revolution was not televised.
It was not the first riot and police harassment continues to this day if perhaps not in such a blatant manner.
Some comments around this event state it was the birth of the gay rights (sic) movement but there were groups and campaigners before perhaps rather unfairly criticised. They were portrayed as older and conservative homosexual groupings.
Understandably there was an element of frustration yet the work of activists like Harry Hay, to name but one are ignored or dismissed. It was just a case of right place (the centre of the major US news media and influential fringe publications), right time. That placed it above other notable events like the Gene Compton's Cafeteria riot, a few years before.
The riots do seem in the following years to have been spun. The ethnicity whitened which possibly makes the attempt to link the campaign for gay marriage with the civil rights movement look even more disingenuous as well as offending black allies and alienating minority lgbt. Trans elements were marginalised as were lesbians it seems. There was no radical movement for trans peoples in the aftermath and things have been slightly touchy with some in the US ever since. As for lesbians I have great sympathy for the suggestion that it was the gender equality movement which provided the impetus.
Then again it probably does not matter whether it was a "drag queen", lesbian or green eyed reptile who cast the first stone it is the symbolic nature and the name which resonates throughout the world.