Terrorists are a threat to peace and security, but they can never be a threat to our freedom. Only the citizens and or the government can pose such a threat.
As much as I approve of your sentiment, the way you phrased it forces me to respond: "tell that to a kidnapping victim." Anyone can, in principle, pose a threat to your freedom.
It's pretty clear from the context that he's referring to our collective freedom as a nation, the freedom(s) granted to us by the very document mr Bloomberg wishes to reinterpret.
I'm pretty sure you're trying to make a distinction that doesn't exist.
I think a few Dutch cartoonists would disagree with you.