The

same piece of hemp that gives you the right to own a gun, gives you the right to Peacefully assemble.

The key word there was Peacefully.

"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."