It just seems to be a human trait to want to protect the speech of people with whom we agree. For the First Amendment, that is not good enough. So it is really important that we protect First Amendment rights of people no matter what side of the line they are on.
The U.S. states that allow for citizens' initiatives tend to have fewer laws and lower taxes than the ones that don't. But the beauty of the system is that it encourages the spread of best practice.