A sieged Senate just doesn't fall into 'stuff happens'. The last it happened was by the hands and torches of British troops during wartime.
https://www.huffpost.com/entry/black-panthers-california-196...
They came armed (nominal, as they went armed everywhere) to a peaceful prearranged meeting at the statehouse. The media turned it into a crazy narrative because black men carrying long arms were photographed inside the statehouse.