[2] In his professional biography claims that in the 1996 received his PhD from the University of Priština in Kosovo (later with temporary seat in Kosovska Mitrovica in Serbia).

[2] However, the accuracy of that information came into question during 2022 scandal about his biographical forgeries, as it would have happened during the Yugoslav Wars and needed to travel long-distance, and there's no record of his PhD thesis in the university's catalog neither was able to publicly show it.

[4] Promoting himself as an expert on heraldry and vexillology, some of his works were critically reviewed by SANU academic historian Slavko Gavrilović, and respected heraldist Dragomir Acović, who deemed it as scientifically worthless because are full of falsifications, false references, lack of knowledge, exceptional claims, and low literacy level.

[1][8] In 2020 and 2021 co-authored papers in which denied the Srebrenica genocide,[9] revisionistically explained the circumstances of the Breakup of Yugoslavia,[10] and claimed that in the 1940s Jasenovac concentration camp died over 800,000 Serbs.

[11] In 2007, the SRS had crumbled and Marko Atlagić had supported the Tomislav Nikolić and Aleksandar Vučić fraction as opposed to Vojislav Šešelj, becoming a member of the new Serbian Progressive Party's presidency and assigned for Refugee and IDP problems.

[12][13] In 2013 caused scandal in the National Assembly by proclaiming first Croatian president Franjo Tuđman as an example "for the proper management of the state" and "for a good solution to personnel problems".

[20][21] In 2023, PEN International published an article,[22][23] and Union of Concerned Scientists wrote an open letter to president Vučić because of Atlagić's personal attack which were additionally promoted by the pro-government tabloids which harassed sociology professor Jovo Bakić of the University of Belgrade because expressed criticism of the government.