YAWN! Who says it is just an "opinion". You? Have you done a personal research in about 5000 books, or more? Sadly, it would be not valid (wiki:No original research);-) Anybody did the research instead of you? (that would be a great source! Why do not you present it?). I inform you that about 5000 books or more (vs. 0) makes the claim verifiable (read here).  
BTW, are you so sure to be born in SPLIT? Your mum says so, but it just her opinion. I would write in your page "according to Direktor's mum, he was born in Split. But the "opinion" that D.  was born in Messina, shall be inserted as well.;-)  
PS: Anyway I would write "according to historians Venice is the birthplace... " (and I would delete the word "opinion", until D. does not present evidences, that historians have no primary sources).