PARIS - An international dispute over European newspaper cartoons deemed blasphemous by some Muslims gained momentum on Thursday when gunmen threatened the European Union offices in the Gaza Strip and more European papers pointedly published the drawings as an affirmation of freedom of speech. In Gaza City, masked gunmen swarmed the European Union offices on Thursday to protest the cartoons, and there were threats to foreigners from European countries where the cartoons have been reprinted. The gunmen stayed about 45 minutes. A newly elected legislator from Hamas, the radical Islamic group that swept the Palestinian elections last week, said large...