oBosch, what Marian and Elgi are trying to say (if I'm correct) is this:
Believing in something so strongely that you push away the rest is the same blind approach.

You believe in the Bible, Moslems in the Quran, others in something else. You see? You only accept ONE thing as the truth and this makes everything else not corresponding into a "lie" or an "error".

I don't do this: I believe that no one knows the whole, absolute truth - I sometimes even think it doesn't exist, because humans wouldn't even recognise it. Every belief, every philosophy, every religion contains a fragment - and a fragment is never the whole. If you can keep this in mind, you might find yourself more open to arguments you can understand, even if you don't agree to them. And this approach allows to discuss, talk, communicate, listen => bringing the human race around one table.

If a strong belief excludes the rest, it can turn into black/white thinking. I really hope, I could express myself clearly, difficult to explain.
Kiya