As it happened, they did not attack Muslims.
Via the Local:
Two men arrested in Västerås on suspicion of attempted murder expressed support for Anders Behring Breivik's massacre in Norway prior to stabbing two men of non-Swedish origin.
Two men, aged 25 and 26, were charged in Västerås on Friday for attempted murder in connection with attacks on two men of south Asian origin at the end of July.
According to the prosecutor the case concerns a hate crime with the men targeting their victims due to their foreign origin.(source)