I learned a long time ago that it's just an excersize in frustration to try and engage in inteligent conversation with ultra-conservatives (just as you may have with moderates and liberals). Logic doesn't work, reason doesn't work, facts don't work. As long as there are heritage foundation sites spouting lies, discussion leads to frustration. But that's their goal. So why bother.
If you enjoy it though, have yourself a blast. But don't be surprised by bad reactions when you push someone too far. They are guarenteed.