What would it take for you to change your mind on that?
Well, there are some... like I dunno... Timothy McVeigh maybe.
I believe that the people you say are trying to "destroy america" are simply doing what they perceive as the "greater good".
I do not always believe what they believe, I do not always disagree... but I don't believe that people are trying to "destroy" the nation.
If anything, I see people trying to bring this nation to others around the world... At times it can be detrimental to the US to do this, both economically and politically, but I don't believe they are trying to "destroy" it.