Disney has a monopoly on the use of Mickey Mouse because they created it and because the spent billions building the brand. That brand is their property, just like a house or a car might be.
The Chinese government arbitrarily declares ownership of other people's minds, and insists they have the right to determine what kinds of thoughts they should be allowed to have.
It's the difference between me shooting a burglar who breaks into my house, versus me walking into someone elses house and shooting them. Yeah both involve violence, but it's not hard to see why one is wrong, while the other is at least understandable.