It's an anti-Trump protest, so named because of how badly Trump wishes he was a king. The slogan (and organization, maybe?) dates back to at least the start of his current term.
Yes. I don't think that contradicts anything I said. It's the third major round in a series of protests and I believe this one was planned after Trump started a war against Iran. I don't think it's a stretch to say that opposition to war was a primary motivating factor for many that attended. I certainly would find that a reasonable conclusion from the signs I saw
Technically not contradictory, but it's pretty weird to call it an anti-war protest with no further qualification, when the overall emphasis, long term anyway, is clearly anti-Trump. Emphasis matters.