You don't even know what the 1st Amendment is. Read it, slowly. Try to comprehend each word.
Here it is, so you don't have to look it up.
Amendment I
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.
First word, Congress. Or, for the terminally stupid CONGRESS. Not schools, fellow students, the PTA or your next door neighbor.
How did CONGRESS interfere with the protesters, who should have gotten the shit kicked out of them by not CONGRESS shitkickers.