I like to point out that the founders were well aware of the various paths toward the abuse of power and tried their best to plug them all. And yes that includes guaranteeing a citizen's ability to defend himself in cases where 'any Form of Government becomes destructive of these ends'
That is of course why Constitutional guarantees are necessary, because they run directly counter to human nature especially in times of fear. As I've said before, if the temptation to torture weren't common then the freedom from self-incrimination wouldn't be necessary to enunciate. If the temptation to railroad criminals weren't common then the right to a jury trial wouldn't have been mentioned. Each of our Constitutional guarantees stands directly in the path of the easy way out. That's why they are there.