In a speech to this weekend’s Awakening conference in Florida, Liberty Counsel’s Mat Staver declared that a ruling in favor of marriage equality from the Supreme Court would deserve “no more respect than Dred Scott or Buck v. Bell,” court rulings that, respectively, denied citizenship to African Americans and allowed mandatory state sterilization of mentally disabled people.

“I say this: If the Supreme Court can’t get it right, or any judge get it right, on the fundamental, observable, natural created order of marriage as the union between a man and a woman, they can’t get it right on anything, that’s their own opinion, and it deserves no more respect than Dred Scott or Buck v. Bell,” he declared.

He warned the audience that a “clash is coming” between religious liberty and LGBT rights that is “unprecedented in American history.”

“Tax exemption, income tax exemption, property tax exemption, everything is going to be impacted,” he said. “You cannot navigate around this. This is a collision of two trains coming in opposite directions on the same track. We are on the precipice of a collision of unprecedented magnitude.”