In some countries similar hatred permeates the whole of society. Poland, the country of birth of Pope Wojtyla, is a good example. There the hatred of the Jews achieved such a pathological level that during WWII a major activity of non-communist Polish guerrillas was the hunting down of escaped Jews. When the survivors of Auschwitz returned to their homes they found themselves targets of attack and mass murder at the hands of Polish Catholics. No wonder that a person who was inured to such political pathology would not notice that he was legitimizing murderous anti-Serb hatred in Croatia.
Civil unrest is easy to start.
At any one time, in most countries, there is some serious injustice and there are aggrieved people who would like to start a revolution if they just knew how to do it, if they had some financing, and if they were certain of foreign sanctuary should they lose the gamble. They are just waiting for someone to show them or help them a bit. In some places there is terrible oppression on the people and they just take it. They are waiting for direction. Any foreign ruler can provide it.