(Edit: this was meant as a reply to an apparently now-deleted (?) comment about why he deserves the anonymity of having his last name abbreviated).
He deserves it for the same reason a single mother raising a kid that gets involved in an armed robbery deserves it: basic human rights.
The idea of those is that they are universal and you'd have to have a very good reason to supersede them. If they are not universal, then they are just "suggestions" and then we end up with exactly the kind of society that this guy wanted.
And yes, being a major political actor is a good reason to lose that anonymity (which is also how it's handled in European media, there is no reporting on Angela M. or Emmanuel M.).
But this guy is a not a public figure in any reasonable sense any more. He's a stupid old guy that was one of the founding members of a extreme-right splinter party of a right-wing popular party in 1967. That party was banned in 1988. So it (and he) has not been relevant to anything for 35 years. He tried to become relevant with this stunt, fucked around and found out.
In fact, reporting on his full name is probably what he wants: publicity is what he was attempting to achieve, but anonymity is what he deserves (both as a basic human right and as punishment IMO).