The First Amendment has 5 freedoms in it.
They include freedom of speech, press, assembly, petition, and religion.
Freedom of religion gives anyone the right to practice whatever religion they choose. It treats Christians, Muslims, atheists, and more equally.
With the First Amendment, you are given the right to express yourself any way you feel about religion. Some court cases that dealt with religion were Reynolds v. United States, Braunfeld v. Brown, Sherbert v. Verner, etc…
In the past, James Madison himself has described religion as an unalienable right, meaning that you possess it and no one can take it away from you.
Everyone should be able to practice their religion without someone going against that.
Religion has also dealt with important issues like life, human sexuality, and marriage. Also, the basis of religious freedom is protecting your religious rights from the government.
Positively, anyone can benefit from freedom of religion. In my opinion, it makes the world a better place. Having different religions does not make a person any different from the next person.