Justice Scalia argued that the Court ignored the Nation's historical practice of public prayer. Invocations and benedictions at public ceremonies, including graduation exercises, were part of a longstanding American tradition of nonsectarian acknowledgment of God, and that history should guide interpretation of the Establishment Clause.
He maintained that historical establishments involved legal coercion: compulsory worship, financial support for religion through taxation, civil disabilities, or penalties for dissent. In his view, the Clause does not forbid a nondenominational prayer when no student is legally required to attend, recite the prayer, bow, say amen, or otherwise participate.
Scalia rejected the majority's theory that peer and social pressure at graduation amounted to coercion. A student could sit silently or stand respectfully without thereby praying or appearing to endorse the prayer. Treating ordinary social expectations of courtesy as unconstitutional coercion, he argued, created an unbounded and manipulable psychological-coercion test.
He also disputed the majority's characterization of the school's role. The record showed that the principal invited a rabbi and asked for a nonsectarian prayer, but did not show that school officials drafted, edited, screened, or controlled the rabbi's words. In Scalia's view, this limited involvement did not make the rabbi a governmental mouthpiece.
The Court's classroom-prayer precedents, Scalia argued, were distinguishable because compulsory school attendance and the daily instructional setting supplied a backdrop of legal and institutional compulsion. A one-time, voluntary graduation ceremony attended by families did not present the same constitutional concern.
Scalia concluded that the decision unnecessarily displaced a traditional form of public religious expression. He believed the Constitution permits communities to include voluntary, nonsectarian prayer in graduation ceremonies while allowing dissenters to abstain without penalty.