Two factors explain the difference in our data: 1) the sources and 2) the date of the survey.
On B92, you have results of a recent survey which indicates that 60% of Serbs are in favour of closer integration with Russia (that evil, undemocratic, mafia ridden, single party rogue state) ;-)
In any case, the fact that a majority of Serbs want better living standards through the EU (or a partnership with Russia) in no way justifies bombing of civilian infrastructure (= war crimes by the Geneva Convention) without a UN mandate (= naked Hitlerian style agression against a sovereign state).