I hate just having to watch ch*ld ab*se happen

Like the title says (unsure of how much I have to censor on reddit 😞) I hate seeing parents/providers hit/slap/scream at their kids. I know it's not my business and I know that it's more accepted in different cultures and communities, but I still hate it. Today I heard a child screaming bloody murder, louder than the normal tantrum and I look over while a father is DRAGGING a 5-6 yr old girl by her arms down the main runway. She's pleading to her mom for help, whiles she's blissfully scrolling on her phone a few paces ahead. The dad then picks her up and throws her over his shoulder to where her head is hanging over his back. At this point she's screaming in pain and pleading that it hurts, the dad is screaming at her LOUDLY to "SHUT THE F*CK UP" to where everyone is turning their head. Eventually they leave but like... There's nothing a little girl could do to deserve that and I hate that we all just have to turn a blind eye. Calling the cops would be a waste of time and most likely cause more harm in the long term. The other wild part is the guests chuckling like "haha kids are such a pain!" I hate you allllllllll

Edit* just bc different cultures accept it doesn't mean I do. I'm coming from a white Westerner perspective. Everyone has different lived experiences that create diverse opinions on what is morally right or wrong and I felt the need to recognize it. Also calling the cops is not always the best option, if no arrests are made or cps is/isn't involved it could just lead to more abuse in the home. Or it could lead to police brutality. Every state runs things differently but there isn't a universal way to involve social services and CPS without the cops. That and putting the child in foster care could also be traumatic. The overall situation sucks