In Nazi Germany Sturmabteilung or "Storm Division" was the paramilitary division of the Nazi party until it was replaced by the SS on the Night of Long Knives.
Some Neo-Nazis have kept up the language.
Stormfront is a popular Neo-Nazi website.
The Daily Stormer is another.
I don't follow Neo-Nazism but I am sure there are others.
So calling the riot a "Storming" is suggestive that it is an organized assault by Neo-Nazis.
