I'm not sure this kind of policy even has whatever the intended effect is, seems how it appears to be a reaction to Charlottesville events.

Take "music that incites racism" (what do you put into Pandora to get that genre?) for example. If you have users listening to it (because before Charlottesville you thought it was okay!) and you remove it telling them their music is basically banned aren't those users just going to listen to it someplace else and feel more empowered by its message?

The more persecuted these groups feel online, the more justified they will feel in their real-world actions.