You're correct that all you said was that free speech and the first amendment aren't the same thing. The statement that you replied to indicated that a response to your speech was not limiting your freedom of speech. I read your response as disagreeing with this statement as well as pointing out the difference between the first amendment and the broader concept of free speech. Did I misinterpret what you wrote?

Dude, you didn't "misinterpret" anything. You just made shit up.

I've found that conversations with people who do that kind of thing are almost never a productive use of my time.

Sorry.