What did you expect when you continued to support Russia's illegal invasion of Ukraine?
First of all, official Serbia has neutral stance, while people in Serbia strongly support Russia because Russia is right in this. Russia is right in direct sense, from the angle of its particular state interests, and also having in mind global picture of emerging Multi-Polar world and also is right, taking in consideration interests of Slavic ie Sarmatian civilization..
You are now "The Enemy", as usual, Serbia picked the wrong side to support.....
No. Serbia is on the right side. And, by labeling Serbia as the enemy already represent strong blow onto NATO but, attacking Serbia again by NATO will cause very very fast end of NATO and sure destruction of countries that dare to attack Serbia. In the region, Serbia itself would deal with threats but, speaking of bigger powers that could be involved, for example Germany or Turkey, it would result in devastating pressure by Russian public on Russia`s leadership to immediately help Serbia (like in the case of WW1) and we all know that immediate and fast help, considering distances, would mean use of nuclear weapons.
In case of NATO attack on Serbia at this moment of worlds reality, would mean that Hungary, Slovakia, Crna Gora and Czeska immediately go out of NATO, and Poland is about to follow or would face internal destabilization to the level of Civil War.