Unsaid, Bosnia has a significant Muslim population.

Via Weekly Standard:

As reported by the Austrian daily Der Standard, some fifty Bosnian soccer fans broke into a chant of “Kill, kill the Jews!” during a pro-Palestinian rally in Vienna’s central Saint Stephan’s Square last week. The incident appears to have occurred on Tuesday, when the Bosnian national team was in town for a match against the Austrian team. According to Der Standard, citing a spokesperson for the Viennese police, the Bosnian fans joined the rally uninvited.

A video of the incident (see below) has emerged on YouTube. The Bosnian fans can be identified by their blue soccer jerseys and other fan paraphernalia. At around the 0:35 mark of the video, they begin to chant “Ubi, ubi, ubi, židove!”: “Kill, kill, kill the Jews!”