The most famous singer of the Croatian far-right became famous at the beginning of the war with the song “Bojna Čavoglave” which begins with the Ustasha greeting “For homeland – ready!”. Perkovic raised his hand in Nazi salute, while the first concert in Zagreb was held on April 10, the day of the Independent State of Croatia. He hugged pictures of Ustasha war criminals Ante Pavelic and Jure Francetic. Portal Index.hr published a video in which Thompson sings the Ustasha song ‘Jasenovac i Gradiška Stara’ which promotes genocide. Although he initially claimed he did not remember the episode, Thompson soon admitted that he sang it in 2000.

His concerts are full of young people dressed in uniforms of HOS paramilitary units with Ustasha greetings. In 2015, Perkovic performed in Knin in front of some 80,000 spectators for the 20th anniversary celebration of the Croatian military’s Operation Storm with many of those in attendance singing Ustasha songs and chanting slogans such as “Kill a Serb” and “Here we go Ustasha”. Concerts by Perkovic have often caused controversy in the Balkan region and have been banned in several European cities, including Berlin.

The Supreme Court confirmed the conviction of the Croatian Democratic Union (HDZ) for the Fimi-media affair, named for the private company used to channel public funds into the HDZ’s coffers. The verdict indirectly exposed that Thompson received money not to sing in the far-right opposition election campaign.