Big mistake. When pro-aborts agree to refer to slaveholders of 150 years ago as "pro-choice" on slavery, then we can talk.
You can take any pro-abort slogan and change the subject to slavery to show it for the absolute absurdity that it is:
"Don't Like Slavery? Then Don't Own One!"
"Nobody Has a Right to Tell Me What to Do with My Plantation!"
"If You Can't Trust Me With a Slave, How Can You Trust Me to Grow Your Food?"
"Keep Your Laws Off of My Farm!"
You get the point. While I'm at it, I never call myself "Pro-Life" because they have a lot of canards related to that, such as "You cannot be pro-life if you eat meat/are for the death penalty/like war, etc." I just call myself anti-abortion, and let it stand at that. If I'm hiding behind a glitzy generality, then I have no right to say that my opponent cannot hide behind one.
I agree. They are pro-abortion and pro-death, NOTHING can be accomplished if we sugarcoat the truth.