For example, when a city attempted to block the march of the Unite the Right rally, they were met with a strong resistance under their right to freedom of speech. Yet Black Lives Matter was treated with far more disdain and had a considerably stronger and disproportionate response to their activism. Freedom of Speech can be a bludgeon to allow movements filled with hatred to further their own causes, while it's conveniently ignored for minorities or said to be 'at the wrong place'.
This is why the ACLU has started to shift their position on an absolutist view of freedom of speech. Because in defending Unite the Right they directly caused harm to minority populations.