A riddle
In a conclusion of a long discussion with a Christian brother concerning the subject of political moral philosophy I resorted to name-calling. I called him both a pietist and antinomian with regard to this subject. His response: "Why do you insist on applying labels to me that you know I am not familiar with?" How does his response betray both his pietism and his antinomian belief?

Hints: from mirriamwebster.com:
pietism
1 capitalized : a 17th century religious movement originating in Germany in reaction to formalism and intellectualism and stressing Bible study and personal religious experience.
2 a: emphasis on devotional experience and practices b: affectation of devotion

antinomian
1 : one who holds that under the gospel dispensation of grace the moral law is of no use or obligation because faith alone is necessary to salvation.
2 : one who rejects a socially established morality