[oh8eleven]

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.

[acsrp38]

You are half right
Congress shall make no law
Nothing in the Constitution prevents state and local governments from regulation assembly
Read the 10th amendment.

It's the hipocracy of the LOCAL government that decides
that certain groups can protest and not others