Croats used to be on german side in both WW's. I don't see them as friends, but i don't see them as enemy. I mean, i can see a war coming sooner or later as balkan had war on every 20-30 years but as i said i dont care i guess to fight a war for someone else.
I see them as a same people like us, having good sea that we don't have sadly which make them more interesting.
Who said we don't like bulgarians? Yes, there is "Orthodox Brothers" between Serbia/Russia/Greece but to be honest not everyone respect that and it's usually just a slogan for ultras, not rarely we go to russia/greece to support CSKA or PAOK, or Spartak Moscow/Olympiakos, depends if you are fan of Partizan or Red Star from Serbia. That's where "Orthodox Brothers" term is most used.