Can you describe what sort of evidence would convince you that this movement is a problem, other than the political affiliations and concerns of the organizers, the behavior of people on the ground, the symbols on display, and what actions they are calling for?
Let me steel-man your proposition. I've seen left-wing protests that were organized by people who were rather questionable, and who were far more radical than the average protester. But in those cases, the content of the protest is carefully measured so it's something everyone can support. I assume there are similar affairs on the right. So no, not everyone who attends a protest has identical views with the organizers.
However, it seems to me that even if you ignore every other bit of evidence and try to focus on what it is these protesters want and are actually doing, it's still a problem.
They don't seem to be here to respectfully petition for a change of policies. This is not the loyal opposition.
This is a Facebook conspiracy theory convened to experience itself in person. They're here to flex "ownership" of a national capital, to validate their own delusion that the government is taken over by foreign powers, to call for the literal murder of a political leader, and to goad each other into more and more obnoxious actions.