Good luck with that conversation.
Any form of "removing idiots" from the voting pool will give comparisons to the Literacy Test, and you will be literally compared to a slave-driver. http://en.wikipedia.org/wiki/Literacy_test
False dichotomies are the bread and butter of politics. Perhaps if you knew the history of this country, you'd know that you aren't gonna get very far on this subject.
I welcome you to try, but from a political / historical point of view, there is too much bad blood in this discussion for people to discuss it sanely.