I would be more suspicious if No Kings wasn't an equally shady/opaque organization actively working overtime to subvert real leftist movememts from gaining traction in the US.
It's a cathartic ritual organized and funded by billionaires that acts as a quartely pressure valve for the working class during the Trump administration. It prevent frustrations from boiling over (like in France) here during this time so the ruling class can push forward with their agenda.
It hijacks all momentum from local political organizing that actually have teeth. It funnels the energy back to the Democratic party, who serves the billionaires just as much as the Republicans.