The state differentiates by establishing objective criteria unrelated to content that serves a rational government interest. Viewpoint discrimination occurs when the state’s regulation or exclusion of speech is motivated by disagreement with the speaker’s ideology. Legitimate selection criteria would involve considerations such as security, administrative convenience, or preserving the property’s intended purpose without regard to the speaker’s perspective on an issue.
For example: A public school may allow community groups to rent its auditorium for events but can exclude groups that would be disruptive to school operations, irrespective of the group’s ideology.