Waltz's Slovenian ethnicity uredi

Hello, I was thinking maybe you could give me your opinion on this https://en.wikipedia.org/wiki/Talk:Christoph_Waltz#Slovenian_heritage I've proven that Christoph Waltz has Slovenian roots (through his mother, née Urbancic) and is related to Josipina Turnograjska, but some editors are trying to deny this and I do not understand why. I'm trying to assume good faith, but the this whole thing really puzzles me. Anyway, I hope that by reading the talk through you will be able to put things in order. Thanks.