He didn't care about anything but staying in power. He was no more a Serbian nationalist than he was a Muslim. He was a political autofellatist (look it up) and he took Serbia straight down the road to a destruction second only to Iraq's, and through the same methodology (invading two neighboring countries and annoying the United States).
Yeah, it is easy to make such claim about political leaders. But neither you nor me cannot read his mind. It is much easier to read the newspapers and this is what they claimed.