Let's see here - this raises some questions. Number one, how do you know this is correct? Perhaps you can cite an example? Number two, would the above proposal prevent future attacks? Your reference to a dencentralized security apparatus is...well, it's humorous. Please support how something such as that could identify security threats that have been here for years (and no, you cannot state "had our borders been closed in the first place", because that is an "if", not reality).
As far as my priorities being incorrect, I'll repeat myself:
Liberty, free trade, adherence to the Consitution, minimal government, etc., are all great things....and completely useless when you cannot protect yourself.
Mexico isn't knocking down our towers. China...well, China is for a different thread altogether. At least we keep our military compeltely superior to them.