The Serbs learned to be uncompromising with Islam through hundreds of years of experience. That is why they are still not Islamic. The same story is true of the Hindus and Sikhs, and the Russians, among others. These cultures acted like brick walls to Islam, and they don't like it.
Cultures that were more soft, politically correct, and not willing to fight to the death were swallowed up and no longer exist.
"The Serbs learned to be uncompromising with Islam through hundreds of years of experience. That is why they are still not Islamic."
Right on! Something to consider as our friends the Saudis build mosques across America.