Juan Carlos Rodríguez.

The establishment clause is part of the the first amendment what it does is it stops the U.S government from officially supporting a single religion as superior or mandatory

Burning the flag is protected by the first amendment this was established by Texas v Johnson in 1989 they ruled that burning the American flag is considered exercising freedom of speech.

Taking the fifth means you have the right to not answer questions that would incriminate you this was enforced by Miranda v Arizona in 1966. That the birth of Miranda rights as we know today.