Cappt: "Rumor is a cat fight in the back. "
That fits what little is known. The captain diverts "telling ATC he wanted to hear from his flight attendants". That's leadership- understated, detached. He's not directly involved. He's doing his job.
Then three cabin crew were sent off due to "bad behaviour". One is an individual meltdown. Two is some kind of dispute. Three is a triangle.
Then the airline presser states "We expect our flight crew to be nothing but courteous and professional at all times and what you experienced was far from that." The slf are far more likely to "experience" problems between members of the cabin crew than between the cabin crew and flight deck.
It fits neatly with the catfight scenario.