By declaring independence and shooting the neighbor's soldiers. If one has to resort to "terrorism" then your cause is not just.
If you don't have enough people ready to honorably defend your independence, then you are not ready for independence.
Yes, Chechnya had de facto independence after the Soviet breakup, but they used Chechnya as a base to foment revolution in neighboring provinces. That is why they got crushed. This is simply part of the 1400 year old Islamic jihad.
"By declaring independence and shooting the neighbor's soldiers. If one has to resort to "terrorism" then your cause is not just."
Spot on, PM.
If a "cause" can only be fought for by murdering bystanders and unarmed civilians for publicity, it is by definition invalid.
The "cause" at that point is only an excuse for wanton murder, and a convenient rationalization for psychopaths.
Such murder, no matter the "cause", automatically invalidates that "cause", and is deserving of everything it brings down on the heads of the murderers.