Applying ordinary free-speech doctrine, the expulsion looks unconstitutional, as professor Eugene Volokh has pointed out. Racist speech is still protected speech under the First Amendment, no matter how repulsive. The fraternity can be banned for race discrimination, which is prohibited conduct. Speaking in favor of discrimination, however, is generally protected.
But Boren's explanation for the expulsion rests on a different theory. He said specifically that the students were being expelled for their "leadership role in leading a racist and exclusionary chant, which has created a hostile educational environment for others."
The important words here are "hostile educational environment." Under federal anti-discrimination law, as interpreted by the Department of Education, a university has an affirmative duty to guarantee students an educational environment in which they are free of hostility based on race or sex.
So Boren was saying that the students are being expelled not for their opinions per se, but because their speech was a form of discriminatory conduct that would create a hostile educational environment for black students. Given that the speech was literally designed to inculcate the value of racial discrimination by making pledges recite their commitment never to admit a black member to the fraternity, this conclusion seems plausible. Removing the chant leaders from campus is aimed to fulfill the educational goal of creating a nonhostile educational environment.
The law doesn't ban speech; it bans the act of discriminating. And when laws are aimed at conduct that incidentally burdens speech, the courts don't subject them to the same strict scrutiny they apply to laws directed primarily at speech.
That's what's going on in Oklahoma. The university is enforcing the legal requirement of a nonhostile educational environment by barring racially hostile conduct. This conduct came in the form of speech — but it can still be prohibited because it was speech only incidentally.
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