Here's what you tell them about the abortion thing:
Centralizing the right in the Federal state is the OPPOSITE of what pro-choice folks should do. This is because, look at what's happening now: you've got a federal right that's completely capable of being 100% eviscerated, or abrogated, by the Supreme Court, and there's nothing anyone else can do about it. That is why Roe v. Wade (and all the following cases that modify it) is not a good decision. Putting rights at the top just allows someone to gain power and abuse those rights. I mean, let's be honest, that's why Giuliani is DROOLING over the presidency, right? He wants to WIELD that power, against the world, against the People.
I'm an anarchist, but I support Ron Paul because his message is a good step in the right direction. And giving him air time, and visible support, is waking up lots and lots of folks, and that is very good for us, the People, and the world. So if you're truly for "choice" in everything (not just abortion), you want to spread everything out, decentralize everything you can (except, maybe, national defense). Some states may outlaw it, sure - but you know, it is a LOT easier for We the People to change a state law, than it is to change a Federal one (in fact, we have absolutely 0% control over it now).