So, style, you state that you hate to be related with Spain due to a publication in mass media and social network comments?..
Unfortunately, I don't understand a single word in Spanish, and I didn't bother putting the article in google translate... Although quick googling revealed a few English articles and sources about this "OK Diario", and it doesn't really look to be trustworthy. But anyways, let's consider that you are right and that Spanish mass media started a real campaign against that poor injured guy.
You perfectly know that any mass media (but very few) are always related and engaged by its sponsors in one way or another. Very often the sponsor is mass media's country government itself. Do you expect that the information would always be presented correctly and impartially? Especially when we talk about scandalous, daily events which are related to the age-old issues. That guy posted something between nationalist and terrorist ideas, then he got injured; now both sides are spilling shit to each other. Try to look from the outside: isn't it ridiculous and in the same time very sad? Silly things, which were said by one, leaded to thousand silly things said by masses, which was caused by a real attack which involved real human casualties.
Besides, if you state that they started a campaign, it means that they tend to impact on your opinion, which isn't supposed to be done by true, impartial mass media. That means that this article and the whole campaign is indeed sensationalism, which only purpose is provoking... And you are getting provoked. Here, in Russia, I face it everyday. Probably it helped me to grow resistance from such things, to search for trustworthy and impartial "news distributors", otherwise our propaganda machine would have already rolled over me and my mind.
And I want to say a few words about nationalism. Nationalists always contrapose themselves from nazi. Like, "we don't want to harm any other nation, we just want our nation to prosper". Pure angels, right? Unfortunately, I have never seen any nationalist organization and/or movement which would really follow this. The vaunted nationalist unity is always based on hatred or intolerance towards "the others", "foreigners". Someone is always preventing them from building brave new world - insidious haters outside of "The Nation We Want To Prosper". Generally I am always very suspicious towards nationalists. The whole philosophy remains tainted (although it doesn't explicitly consist of hatred): why do you think that some people deserved to live better than others only because they got out of womb at the particular region of the Earth? What is "nation"? An artificial attribute to divide people even more. I won't definitely live until this term becomes obsolete, but at least I can dream of it.
Suming up, I know about Basque conflict only in general terms. But in general the problem is actual pretty much everywhere in the Earth. Russian and Ukrainian mass media do their best to grow hatred between Russia and Ukraine. Of course, there are always objective reasons in any conflicts, but biased mass media are always willing to escalate it. How many times did I read comments about European attacks from the Russian highest authorities like "They deserved it, God punishes you, Gayrope!11". Yes, it is such a shame. Such a shame we still have it in XXI century. It's not about Russian authorities, it's about the humanity in general. Every goverment is pretty much the same when it comes to lowdowns of politics.
And your statement, style, can probably be applied to every single country (nation) in the world.
Why? Because in <country name> there is no difference between nationalism and terrorist (unless it's <country's titular nation> nationalism, "the only one good nationalism").
So, that's <country name>, full of hate.