The breakaway Yugoslav republics Croatia & Slovenia were recognised first by Vatican & then by Germany. At that point, no fighting has started. It could be argued that their recognition ignited the conflict.
A good comparison would be if Vatican & Germany recognised Catalonia and started to arm them.
> It's exactly the opposite with Russia.
Well, NATO bombed Yugoslavia, in 1999. under the made up charges of ethnic cleansing, but it was only after the NATO offensive started, that the people started to migrate, to avoid the conflict.
An interesting fact to consider is that the bunkers built during the Hitler's German occupation of Serbia were staffed by German soldiers, in their first military action after the WW2.
Comparisons with Russia are not applicable in this case.