Your "rights to free speech and what ever else" haven't been violated here. That is a load of bull and you know it. The only organization you can claim that about is the government, whom is your servant.
When you joined, you were entering an agreement with the people who run this forum that you would stay within the guidelines of posting. Even if your
initial post was cordial and non-inflamatory, that doesnt prohibit your entire thread from turning into a flamefest with or without your interference.
In short, the mods here can shut down anything they please. It is their perogative to shut down threads that have left the realm of good taste and civility, or those that have reliably generated very heated flamefests.
If are leaving because those in control whom you entered into a contract with made a decision within the realm of their purveyance, than too bad. Dont let the door hit you on the way out...
