The 13 colonies had good reason to distrust the new central U.S. government's disposition towards internal divisions , and they harbored absolutely no faith whatsoever that it could defend the states in the event of external threats.
Yes they did. After all, just six years past they had fought off a despotic form of government and were now in the process of forming their own. They had both history and their recent venture as lessons of what governments can do when left unchecked. What our Founders did in this nation was being watched closely by the nations of Europe. We were hope for the peasants suffering under monarchies, and fear of those monarchies for what we did and what it might cause in their own countries. Humans seem to always revisit lessons of those who went before them.
And history, along with pain, are the greatest teachers.