It’s better for both parties to return to negotiations as cutting all links will give ETA justification to escalate its bomb attacks and to the Spanish government an excuse to keep its detained members in its jails while keeping its hunt for the other members who are still free to plan attacks or make political speeches.
It is likely that there are hardliners on both sides, which has made final solutions hard to reach. A return to violence will just isolate ETA as today terrorism is widely condemned and international efforts are intensified to combat it. The Spanish government will have this as a winning card while ETA's arguments will fall on deaf ears as very few are today enthusiastic about this kind of struggle.
ETA should learn from the IRA, which finally put down its arms and has become a political party, whose members like Jerry Adams are showing their faces to the world rather than hooding them or remaining in hiding. The Basque region even after independence will need to unite with the EU through