John Stuart Mill would be rolling in his grave if he saw how you generalized his quote.
You're so close to making sense, but you fail to make that final connection and understand that protecting are freedoms does not justify preemptive war. You acknowledge that most of the modern day wars are no good, but then try to justify fighting them ... for what? Because you disagree with the culture of a foreign people? Guess what: they would have no beef with us because of our culture ... if it were not a culture of preemptive war.
The reasons for the recent wars cannot be drawn back to preserving our freedom except in the propaganda we're fed.
Instead, we are ensuring our demise via our foreign policy.