Answer:
Pan-Slavism in the south would often turn to Russia for support. Austria feared that Pan-Slavists would endanger the empire.
Adopting the Slavophile notion that western Europe was spiritually and culturally bankrupt and that it was Russia's historic mission to rejuvenate Europe by gaining political dominance over it, the Pan-Slavists added the concept that Russia's mission could not be fulfilled without the support of other Slav peoples,,,