They are wrong because their claims to good reasoning do not match the evidence of their performance. Dawkins' book "The God Delusion" is rife with logical fallacies and demonstrably anti-scientific prejudice. Sam Harris devoted most of a recent debate to avoiding logic, advancing an argument based on emotional appeals instead. John Loftus says that his "Outsider Test for Faith" shows that belief is irrational, when his test actually demonstrates the opposite.
They are also wrong because Christianity is built on a foundation of evidence and thought. The Bible is a record of what God has done. It tells us through and through to see what he has done, and to trust him based on what we know to be true of him. Jesus requires his followers to love God with all of their minds. The Apostle Paul reasoned in the synagogues and with the Greek philosophers. Down through history, many of the world's greatest thinkers have been Christians. It's still true today.
And they are mistaken in not seeing how Christianity leads people to treat each other reasonably. Sure, there have been exceptions, but on the whole Christianity has been the world's greatest force for freedom, peace, human rights, and of course the highest good of all: knowledge of God.
This is not the party line. Even Christians may not know this is true. If any of this seems surprising to you, then it's time for you to discover "True Reason".
You can buy the book for about lb2 here, what a deal! Its already up to #2 in the Amazon charts in the Atheism section.
Book information taken from here.
Credit: 33witches.blogspot.com