What has happened in this case is that a preliminary investigation has been initiated. It is not a formal prosecution. This investigation is carried out by a prosecutor. I am afraid the editing makes this less clear.
When it comes to linking my original links was to the Swedish media reports on this case, which would clarify things further. It appears from Swedish media reports that Mr Bildt and his staff are constantly monitoring this blog for hateful comments, but that they missed this specific comment, even though a blogger claims to have pointed out this comment to Mr Bildt and his staff on several occassions. Personally, I do not know the circumstances well enough to tell what is facts and what is not in that respect, but it might affect whether Mr Bildt will be prosecuted or not. Perhaps some Swedish lawyer versed in the field could give a short brief of the current legal situation in this field.
"Trust me. I know what I'm doing." -- Sledge Hammer