The Djavoli are primarily an anti-fascist supporter group . One reason is the Kragujevac massacre by Nazi German soldiers during World War II . About 7000 Serbian men and boys were murdered . Therefore , there is a deep-rooted antifascist attitude within the Djavoli . The group 's traditional colors are mainly red which are also the colors of all the Radnički Kragujevac sports clubs . During games fans will often be clad in red , as well as official team merchandise , and other productts . Red caps are especially popular , just like the first fans of Radnički Kragujevac through which they were recognizable . Some also wear the Šajkača . Their style of supporting includes the use of flares and large flags , choreographies , chanting , and displaying banners . Instruments such as drums and trumpets often feature , similar to the supporters in South America . This creates for the region a typical and distinctive atmosphere . Similar to the Balkan Brass Bands during the Guča Trumpet Festival in central Serbia
Kragujevac massacre
Kragujevac massacre
Crveni Đavoli