Christian conservative Bryan Fischer on Thursday accused gay activists of attempting to reimpose slavery on the South.

Fischer was reacting to the news that four lesbian couples had filed a federal lawsuit challenging the constitutionality of Mississippi's law banning adoption by same-sex couples.

Mississippi is the only state left with an outright adoption ban based solely on sexual orientation.

(Related: Four lesbian couples challenge Mississippi's adoption ban.)

“If the homosexual lobby is successful on this,” Fischer told his radio audience, “then they will be forcing the state of Mississippi against its will” to drop its ban.

“Ladies and gentlemen,” Fischer said, “that is just a form of tyranny. When you compel people to do things contrary to their will, contrary to their conscience, that's slavery as well as tyranny. So you think about it. Who's bringing slavery back to the South? Who's bringing slavery back to the Confederate States of America? It's the homosexual lobby. When you compel people to provide services against their will, that is involuntary servitude, that is slavery. I submit to you that it is the homosexual lobby that's single-handedly bringing slavery back to the Confederate States of America.”