It actually confirms what I'm saying about the etymology of the word:
"Though there is a word similar to rättshaverist in German, since it comes from Rechthaber - one who has right and understood, one who is of the opinion that he is right. The German word is most often used about someone who thinks he knows best. The German Rechthaberei is in Swedish distorted with the suffix -haveri, which becomes a pun that emphasizes the self-destructive character of the behaviour. Another German word is Querulant."
"Haberei" in German simply means "having" while "haveri" in Swedish means "wreckage" or "making havoc". A "haverist" in its original Swedish sense is a wrecked or wrecked-to-be ship, which is exactly how Swedish authorities and a great deal of the Swedish public look upon someone claiming his right with emphasis.
This is also interesting:
"According to Susanne Bejerot, Swedish psychiatrist and member of the committee of Nils Bejerot's Memorial Fund, rättshaveri is common within the Asperger group. According to her this might be explained by 'a personality charecterized by lack of common sense, pedanthic rule-thinking, pronounced stubbornness and verbal talent'"
Or simply that AS-people have a stronger sense of justice, though in Sweden claiming your right is a Catch 22, so if you claim your right in Sweden, you by definition lack "common sense" in the eyes of society.