Isaac Latterell, a Republican member of the state's House of Representatives, wrote on his website about "revolting methods of execution" such as the beheadings carried out by the militant group.
"Planned Parenthood abortionists in Sioux Falls are similarly beheading unborn children during dismemberment abortions," Latterell wrote.
Not surprisingly, Planned Parenthood took issue with his comparison.
"I think the majority of South Dakotans would agree that comparing Planned Parenthood to a terrorist organization is just going too far," Planned Parenthood spokesperson Jennifer Aulwes told Talking Points Memo. "No matter what you feel about abortion or about Planned Parenthood, it's an inflammatory and really inappropriate comparison."
Latterell is a sponsor of a proposed law known as the "Preborn Infant Beheading Ban" that would ban late-term "dilation and evacuation" procedures. Critics say the bill, if it becomes law, could be used to imprison doctors for performing certain abortion procedures.
Those who support the ban say these procedures can separate the skull from the spine. But Aulwes told KSFY that the bill is both medically inaccurate and inflammatory and that Planned Parenthood's only clinic in the state doesn't even perform abortions after 14 weeks.
Latterell claims the procedure has been performed in South Dakota seven times since 2008 and accused Planned Parenthood of lying about it. He ended his post by paraphrasing Matthew 7:5:
"While we rightly take the speck out of our neighbor’s eye by holding ISIS accountable, let us be sure to take the plank out of our own eye by holding Planned Parenthood accountable," Latterell wrote.
(h/t Raw Story)