I know people will try to draw a parallel between this and banning Parler, Trump, etc from social media but they are quite different. A radio station operates more like a newspaper and vets everything that is broadcast on its channel and has to grant access to do so, that isn't true of social media. This would be more akin to CNN/MSNBC/etc refusing to air Trump rallies.
Radio stations regularly have live interviews with listeners, and my local NPR station ends those segments with "the views expressed in this segment may not reflect those of the station, underwriters, or management".