Long ago I was quite active in the antimilitarist movement (the Conscious Objection Movement). Once we decided to adress the issue of civil disobedience in the context of the Basque Country but eventually the discussion became polarized between those that thought it meant basically asking for the end of ETA and those that thought that it was beyond that: it was about making ETA useless by creating a real movement for self-determination on nonviolent grounds. This discussion became somewhat problematic as certain member published his own opinion and others published a harsh criticism in response. Eventually all the work became blocked because of that.
Gandhi wrote that the real difference is not betwee those that fight with weapons and those that fight with satyagraha (nonviolence) but between those who fight and those who do not. So you guessed well: I was markedly alligned with the second position, as I believe the first one is manichean and hypocritical.
In fact I really dont know how correct was Gandhi about everyting. His satyagraha worked well enough in India but it would be near impossible in other circumstances surely. On the other hand, more than a decade of nonviolent resistence in Kosovo yielded zero results, while a few weeks of armed action have given de facto independence to this country (though certainly thanks to foreign intervention rather than their own forces).
Anyhow, going back to my own country, the few attempts to create a civil disobedience movement have been quelled through judicial inquisition, assimilating them to ETA (and legitimating this group a lot - even if some don't want to see that), along with many other expressions or actual Basque self-determination in daily grounds (specially press but not only).
Another problem is the submissive attitude of mainstream "nationalist" parties, accepting Spanish law and implementing it out of pure conformism and fear of losing their profitable administrative seats. They really don't want to confront the state but very slightly and symbolically. Not that being so shy and obedient will avoid prision for them, as happened with the former chief of Basque police, now indicted on grounds of disobedience to Spanish special super-judges.
Basque politicians have taken two paths that possibly bring us nowhere: the path of institutional collaboration and the path of armed resistence. Nobody is really promoting a third way of nonviolent resistence independently - and, well, certainly, it's very possible that the Spanish Neoinquisition would get them classified as "dangerous terrorists" anyhow as soon as they issue any public opinions that are not exactly the stupid "condemnations" of non-institutional violence required by the state to let you be.
It's a complex issue and has become much more difficult in the last two decades. I'll see if I can seed some ideas around in the future.