Not that long ago American universities emphasized tolerance of all views so that truth would not be obscured by dogmas. Little doubt this emphasis traced its heritage back to the Church's interference in the scientific question whether the earth was the center of the solar system. In order to save their lives, astronomers were forced to renounce their findings and to assert the truth of dogmas that they knew to be wrong.
Today the same thing is happening in American universities, only the deadly controversies are over race and gender issues, not whether the sun revolves around the earth.
When I was a student liberal professors found Voltaire to be an exemplar of the correct attitude toward free speech. Voltaire quotes were used everywhere in the halls of learning:
"Think for yourself and let others enjoy the privilege of doing so too."