"Congress shall make no law respecting an establishment of religion, or prohibiting the free exercise thereof; or abridging the freedom of speech, or of the press; or the right of the people peaceably to assemble, and to petition the Government for a redress of grievances."

PEACEFULLY assemble, not act like a bunch of drunk jerks. Oh wait, they were a bunch of drunk jerks. I doubt they were expressing a grievance against the government so your point is moot.