A staunch anti-communist, Kostov has been voicing opposition to the present leadership's more moderate policies, its readiness to seek allies with former members of a UDF-led coalition, and what he describes as its failure to offer adequate political solutions to pressing problems.
Nepokolebljivi antikomunista, Kostov je izražavao protivljenje umerenijoj politici sadašnjeg rukovodstva stranke, njegovoj spremnosti da teži saradnji sa bivšim članovima koalicije koju je predvodio UDF i, kako je rekao, neuspehu da ponudi adekvatna politička rešenja za najveće probleme.