The act was committed in Sweden. What about that don't you understand. Going by your logic, Germany can issue an arrest warrant for any poster on this site. No, the offense happened on servers located on US soil. If a country has extradition treaties with the US, then any of their citizens who commit offences  against the US  are subject to extradition.    If the Swedish citizen were hacking Swedish computers, the US wouldn't care. Nor if they were Russian computers, although the Russians might if they have extradition treaties.    BTW, Germany would certainly be able to do something against Stormfront IF the servers were located in Germany. Otherwise, the only folks they can go after will be any Germans who may be posting here.