Where you been Fernando man? Haven't you heard, You can lead a horse to water, but you can't make it drink or a man hears what he wants to hear and disregards the rest or don't toss pearls before the swine??? Back right off. Go gentle. Do something to the witnesses that they probably never did to you: Show them respect for their right to decide for themselves.
People have got to care enough about the accuracy of what they believe and be disturbed enough by it to even begin to think about assessinhg it further. If people are satisfied - or smug - with their beliefs, if they have vested interest in being correct and if they have already invested a lot of time, money, effort and pride in a belief system, chances are they won't read anything against that belief system - even if they could do so secretly.