The crown jewel of protecting free expression, at least here in the United States, is the First Amendment. So long as your mode of expression does not physically harm another person or physically damage the property of another, your mode of expression will be protected. The mere fact that onlookers or listeners find your comments or actions to be offensive is not a basis for banning that form of expression. Since its ratifcation in 1791, the First Amendment has stood as the bulwark against censorship. Under the First Amendment, no branch of government can ban or punish blasphemy.
Non believers can express their views about religion and never fear criminal prosecution.
You can say the most vicious things about the president of the United States and never be thrown into a prison cell. Now, for the first time in American history, we stand on the verge of amending the First Amendment in order to weaken its majestic and sweeping protection for unpopular modes of expression. The House of Representatives has passed by more than the necessary two thirds majority a proposed amendment to the United States Constitution that would remove constitutional protection from those who burn or otherwise physically desecrate their own individually owned American flags. The Senate is set to vote on this proposed amendment to the Constitution in September. If 67 senators vote for this, it will then have passed the required two thirds vote of both Houses of Congress and will then go the states for ratification.