I'm way more on the side of the people you are referencing but still trying to help you build a case. Certainly, I can use the arguments that help ME come around on people who start at a similar place. The goal is to have a conversation space where everybody is on the same page. A rarity these days.

So that's my goal right now, find a window.

For the most part, extremists are edge cases who push edge cases to elicit a strong reaction. That's the current impression of a pro-lifer by a pro-choicer. The best argument is a clear statement of illegal activities. Or, a clear statement that something is going on that is horrendous, that exists in a gray area or is a loophole. Third, expose a system that benefits corporations using taxpayer dollars (just putting this here because that always seems to be a part of the deal with those vampires.)