What are Basque extremists?

Those who support complete independence of Euzkadi("The Basque Country") from France and Spain have been called Basque extremists.

Specifically, Euzkadi consists of three provinces which are found on the northwestern side of border between southwestern France and northwestern Spain as well as of four provinces which are found on the southwestern side. The four provinces which make up the Southern Basque Country have autonomous status within Spain by the 1978 Constitution. Some Basque people would like the provinces to be joined in a country which has complete independence from the region's other two countries.