The Red and White Sahovnica predates the Ustashe by 1,000 years. Get your facts straight.
What Franjo did was use that piece of history, which was used during the heavy Ustashe era of WW2, and restored it to national prominence.
With his pogrom of ethnic intimidation to drive non-Croats (Serbs) out of jobs, positions and the police, he re-installed the fear of Jasenovac and the HDZ/Ustashi alliance with the Hitler and his Nazis.
What do you expect the Serb reaction to be? One of peace and harmony with a people that supported his national social program.
Hey Darko, when in your opinion did the Serbs begin their "antagonistic" cleansing and or problems with their Croat neighbors?
And the swastika predates the Nazi party. So what?