We know how this ends.
The parent tried to love their child into behaving well. They never wanted to make a scene.
The child quickly figured out how to manipulate their parent. That is their job.
The parent bribed their child to behave in a civilized way. The worse the misbehavior or the more public the venue, the larger the bribes.
The child took notes.
Now the kid is on the brink of adulthood. They resent having to go to Walmart with mommie. They are going to let everybody know it.
Merchandise gets swept off the shelves. Carts over-turned. Bottles broken. Abusive language flies.
As long as the show was between Mom and the Brat, it was Mom's rodeo. But it stops being a private affair once the Brat overturns somebody else's cart, or gets red wine on something that needs dry-cleaning or an adult slips-trips on the trash on the floor or the kid assaults one of the other shoppers.
How is this any different than how the Democratic party treats their captive zoo-topia of voters?
The Dems either bring their menagerie to heel or it will be done for them. Like Open-Mic night at the tavern, the amateurs will run the show and it ain't gonna be pretty.