“Suspected White Supremacist Shooter In Dayton Was Reportedly Angry His Sister Was Dating A Black Man”
https://newsone.com/3883585/dayton-shooter-killed-sister/
Newsone.com... well, I suppose it might be a bit more reputable than Al-Jazeera. As for the article, it seems to be “based” upon some Twitter commentary - IOW, sheer speculation.