Shutting down free speech

I comment on many boards and Internet forums. I have been making many comments in support of arming teachers and opposing gun control schemes these past few days. An anti gun teacher from a nearby school district just tried to find out where I work so that they could contact my employer in an attempt to have me fired. Those who opposed to the right to keep and bear arms are opposed to all rights that do not align with their own. 

This is why I keep my personal details private. However, if my employer ever did fire me because I express my political views, being that my employer is the government, it would be a violation of my right to free speech.