I don't think that was the point. He's calling out the people who call for state's rights on abortion but do not support states' rights to legalize slavery. Likely though, he wouldn't choose my wording.I see the connection... calling it a right to choose when what you are choosing is to end a life is a lot like calling it state's rights when the right you want is to own slaves. I can only presume from your arguments that you are pro-choice and believe abortion to be the ultimate expression of liberty from government intrusions. Correct, or no?
My answer remains, when does life begin? The answer to that question demystifies his question.