One should take that as an example for any sort of trust-building between Croats and Serbs, since WW2 was as well the single worst chapter between Croat-Serb relations (excluding the 90's that were a prolongation of the WW2 conflict).

It would be very good if they could move past their differences in a similar way. Slavs are still so divided. Yugoslavia should revived, but as a confederation or something akin to a Visegrad Group (coordinated defense policy, economic cooperation) since now that Greece has tanked and Italy looks like it is going to do the same, Turkey will be moving up into Europe. Not literally, but with a sphere of influence. I really would not like to see Slavs fall under Turkic influence just because they couldn't patch some dirty history up.