The question is whether the current government of Croatia owes reparations for what the puppet state did. Very few of the actual perpetrators can be still alive.
According to David Rodogno in Fascism's European Empire: Italian Occupation during the Second World War (2006), in reference to early 1943, "The Ustase were profoundly hated: isolated and devoid of any prestige, they were incapable of resolving the country's difficulties. Fully 80% of the Croatian population were opposed to the regime; 10% declared themselves 'apolitical,' while only a tiny minority still supported the Ustase." (Half of the area of the Croatian puppet state was under Italian occupation.)
Also, "Elevated to power by circumstance, Pavelic was obscure, almost unknown; he had neither the reputation nor the prestige to construct a solid political base and frorm an efficient state apparatus. The country treated him with cold indifference or ill-concealed hostility: who, the people enquired, is this nonentity imposed by foreign bayonets?"
That is part of my second point. I don't believe in group guilt. If I did, I could not also believe in repentance. The two concepts are diametrically opposed to one another.