Discrimination is unequal treatment of someone without due and lawful cause.
As part of your notarial duties, you are professionally obligated to impartially honor any lawful and reasonable request for a notarization. For example, you should not refuse a signer whose document supported a political candidate you dislike, or a document that endorses a cause or movement you oppose. Refusing to perform a notarization because of your personal beliefs regarding the signer's political position, creed, religion or ethnicity would be discrimination.