Here's an interesting question: when is political violence OK? If we always condemn violence we should apologize to the Queen & rejoin the UK.
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Was the Revolutionary War OK? Why or why not?
Yes.
The best answer to that question can be found by applying the principles defined within the Just War Doctrine
https://www.iep.utm.edu/justwar/
To summarise the primary conditions which must be preemptively considered:
Just Cause
Legitimate Authority
Formal Declaration
Right Intention
Probability of Success
Proportionality
Last Resort