The correct answer to this open question is the following.
I think heroic action is a reflection of a positive attitude or feeling of the doer towards the situation, another person, or the country, but no all the time.
Sometimes a heroic action is the consequence of a desperate "live or die" moment in which people have to do something "unimaginable" or "impossible" in order to survive.
Once in a while, we see the news reporting on how a mother, a slim woman, performed an unbelievable act to rescue her children after an accident or an earthquake, lifting heavy rocks or objects to take her children or family member away from risk.
These situations just happen under too much pressure, where people automatically react to save lives, for instance. In the same example of the slim woman, by no means she could lift heavy weights in normal conditions. But under too much stress and facing life or death situations, people become heroes.
Answer:
Affirmatively, ethnic groups seeking independence as free nations have other methods to achieve their goal, without incurring terrorist actions.
Although sadly we have plenty of examples of terrorist actions committed with the aim of forcing the independence of a certain ethnic group (ETA in favor of the independence of the Basque Country in Spain; or the terrorist actions of the Kurds in the Middle East), there are many other ethnicities who have sought their independence through peaceful means.
An example of this is Catalunia, which since 2012 has been trying to separate peacefully from Spain, even declaring its independence in 2017 after a popular referendum.
Another example of independence by peaceful means is that obtained by India, in which its population participated in non-violent protests and action measures against Great Britain, without incurring armed confrontations or sporadic attacks.
They appeared unpatriotic, calling for a rewriting of the U.S. constitution.
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