In answer to Chris's question, sometimes those that grew up in truth are a little less passionate, but sometimes they're just tired of butting their heads up against a brick wall for so long. The truth is so obvious to us that it's sometimes difficult, and frustrating, for us to accept that others just can't see it. It's right there! In black and white, in the bible! Yet for whatever reason God has not decided to call everyone at this time so the truth isn't obvious.
God does call people, and he sometimes uses us as vehicle to draw them to the truth. As Diego said, we need to continue to use this forum and other vehicles to get the truth out.
The amazing part are the different paths we all take and end up at the same conclusion.