Honestly it's all personal stuff, heaven knows why it's in the news only because the people involved court attention in the first place, no doubt there are publicists behind the scenes micro managing it all. It is possible to be a "personality" and not have one's private life, family dynamics and fall outs in the public domain Exacerbated by these individuals own hands, sending cryptic and at times vitriolic messages to each other via social media and curated for effect to keep the brand ongoing. They could adopt the radical notion of having these disagreements privately
Read threads on here and MN to know sadly these situations are not unusual it happens to ordinary mortals too, and others have said, there are two sides to most situations and only the parties involved can know the whys and wherefores.