Mondragon is about as "nationalist" and "ethnocentric" as Ford, Samsung, or Sony. I'm not sure what "strong political orientations" is supposed to mean; I can easily point to just about any international corporation and find evidence of strong political "orientations" expressed by the board or its corporate executives and evidence of the corporation pursuing their political interests as well.
Also, Mondragon cooperative is regarded as a world leader in worker coops, so unless you're talking about people who know absolutely nothing about cooperatives, I think Mondragon remains a pretty "general" example of what's possible for cooperative business. In any case, it's certainly not clear what you think is a "regular cooperative."
> If a small part of Vermont where 'its own country' and constantly under threat of economic annexation from the US or Canada, well, people might organize differently than they do in California.
Well, Basque is not under threat of economic annexation from Spain; it's already annexed. People in Basque do often oppose the Spanish government for nationalist reasons, but it's just one of many reasons considering that the internal struggle in Spain is a country-wide issue and not reserved to Basque. And nationalism in the region is hardly evidence that Mondragon itself is a nationalistic entity. Lastly, it's very unlikely that a region "under threat of annexation" would choose to develop cooperatives to maintain economic autonomy. The reason Mondragon succeeded was primarily because of the influence of Arizmendiarrieta, and he spent around 10 years trying to convince people to start a cooperative in Basque (in other words, people in Basque did not automatically acclimate to the idea of a worker owned cooperative.) Arizmendiarrieta himself was not from Basque and did not speak Euskera natively, and did not entreat his followers to see cooperatives as a uniquely Basque enterprise, hence why it is now an international organization rather than secluded to the northern Spanish region.
Additionally, worker owned cooperatives aren't unique to Basque, Spain, or even Europe. And it's not like everyone in Basque worships Mondragon either. I am no expert on this, but I've been to Basque, visited Mondragon, and interviewed a number of people on the subject of cooperatives in Spain. From what I can tell, your perspective here is quite warped from reality.