To redirect revolutionary energy from destroying to the system to just criticizing Trump. It is a way for them to gain popular support and show themselves as anti-establishment instead of the bourgeoisie that they are who need to be overthrown
Not Walmart the corporation. She’s only a Walton by marriage, and I believe her kids own the majority of the store.
They’ve denounced her involvement. They’re probably scared Donny won’t know the difference and punish them.