I can say something. Firstly, Unamuno was not basque in a ethnic and linguistical way (I know he was born in Basque Country). Secondly, Unamuno was a jeacobin who hated all languages different from spanish, calling them sharply "dialectes". Thirdsly, Unamuno would be surprised if he lived right now and realized how communism, and not christianims no more, is the most extended ideology in Basque Country.