The National Organization for Marriage (NOM) has suggested it favors the re-criminalization of gay sex.

The nation's most vociferous opponent of gay marriage has previously said it is fighting to keep marriage between a man and a woman but harbors no animus towards gay men and lesbians, and has gone so far as to suggest that gay rights activists are intolerant.

In fact, the group's anti-gay marriage pledge – signed by Republican presidential candidates Tim Pawlenty, Mitt Romney, Rick Santorum and Minnesota Rep. Michele Bachmann – specifically calls on candidates to investigate the “harassment of traditional marriage supporters.”

In a blog entry posted Tuesday, the group points out that the marriage equality movement began with the legalization of gay sex.

“And it all goes back to Lawrence v. Texas,” the group wrote, referring to the landmark 2003 U.S. Supreme Court case that overturned state sodomy laws.

Carlos Maza of Equality Matters notes that the Christian conservative group Family Research Council (FRC), a NOM ally, also objected to the court's decision, arguing that it would pave the road to polygamous marriages.

“This anti-Lawrence sentiment is cause for major concern, and raises serious questions about what groups like NOM and FRC ultimately hope to accomplish in the fight against marriage equality,” Maza wrote. “[T]he final goal of groups like NOM and FRC seems to be to pull the decision out by its roots: reversing Lawrence and allowing for the re-criminalization of homosexuality.”