"You're telling me that terrorists can decide to do away with the Constitution, and with our freedoms?"
Your post is so wrong, so misguided on so many points, that I won't spend too much time with you other than to say that yes, terrorists and other enemies both inside and outside our country do influence the freedom we enjoy here. If we allow them to use our liberties against us, if we allow them to hide behind technicalities, then our freedoms will never last. Our enemies will have the last word.
In fact, I'm quite suspicious about your level of education. Mine is pretty good. Good enough to have been taught that in every war we fought up through WWII we have had to temporarily suspend a small portion of our liberty in exchange for our own national survival. After each of those wars we came back freer than before.
I'm quite sure I understand and appreciate our system of government far better than you do. I know that if we don't act to protect it from totalitarian threats, one day I'll see a lot of people like you *really* screaming about your loss of freedom; not in the paranoic fashion you are now, but with real screams of fear.