It wasn't premeditated. And it's not a tantrun to stand up against your oppressors. People were arrested due to discriminatory and prejudiced laws, people said no more, stood up, and began the riots that kick started LGBT rights. Sort of like how the French Revolution was definitely not a tantrum, but a fight for a more just society and a fight to literally keep their heads attached.
A tantrum is telling a child no and the child throws themselves on the ground kicking and screaming.
The French revolution was an insurrection to overthrow the government - a civil war, in effect.
I notice you continue to use these grand, but tendentious, terms like "rising up" and "standing up", while remaining coy about whether violence was involved and, if it was, whether it was deliberate or not.
Unpremeditated violence, erupting in the course of a demonstration, would be what I would say could be thought somewhat akin to a mass tantrum - though I have been clear from the start that tantrum is not really the appropriate term for it. Premeditated violence, in pursuit of a political cause, is something I would regard as far more sinister. I don't have a lot of time for people trying to defend that in a functioning democracy.