Was thinking about that the other day. Wondering whether something on the level of the Viet Nam War protests in the Fall of 1969. Organized efforts on college campuses, cities throughout the country followed by a big protest in Washington. It was all peaceful for the most part, there was a clash with police after the DC March, but no riots.
Unfortunately it won't work today, the country is too fractured. Groups like the Proud Boys and other far right wing groups and similar groups on the left almost make it impossible (think Charlottesville). It would have to include significant representation from a wide spectrum of citizens.