Don't be so sure.
During the recent war they burned his memorial house and destroyed the monument in front of it. They also demolished his monument in the nearby town of Gospic at the beginning of the recent war and it appears they don't want it back: http://bit.ly/JnSQkg
In Croatian schools, they always say Tesla was Serbian and born in Croatian territory. Both Croatians and Serbs are proud of him, I guess.
As for mutual hatred, many people lost their families in the war, and obviously many Serbs were part of the aggression, so the relationship is no wonder.
Anyway, the article is great! Just what I needed.
The hatred dates well before the 1990ies. See this: http://en.wikipedia.org/wiki/Jasenovac_concentration_camp. The more you know, the less you want to know.