Um, the "Basque Nationalist Party" has been in power for the last 30 years in the Basque Regional Government and still holds the largest parliamentary group in the regional parliament. The only party that has been banned (and I personally disagree with that) is ETA's political arm. Like I said, Aralar is full of former ETA members who now renounce violence, and they are allowed to contest elections and hold office.
Give them what they want. they will never recover.
There is not a they to give it to.
Plus, unlike in Northern Ireland, "they" are a small minority. The peak-to-trough part of the business cycle is an outlier. Carnot would have died laughing.
Nevertheless, the alternative to doing something different is to keep doing that which has not worked up to now. I suggested an alternate solution that had the distinction of never having been tried.
Actually the IRA, Sinn Fein nationalist community in N Ireland is pretty small too. Just as their nationalist protestant opponents are a tiny minority. I have always complained that the absence of secular British political organisations in N Ireland has denied the majority of people of Ulster a non-denominational choice. keep to the Fen Causeway