Certainty about the next life is simply incompatible with tolerance in this one. - Sam Harris

The penalty for apostasy is death. We would do well to linger over this fact for a moment, because it is the black pearl of intolerance that no liberal exegesis will ever fully digest.....As a source of objective morality, the Bible is one of the worst books we have. It might be the very worst, in fact—if we didn’t also happen to have the Qur’an.

Science has long been in the value business. Despite a widespread belief to the contrary, scientific validity is not the result of scientists abstaining from making value judgments; rather, scientific validity is the result of scientists making their best efforts to value principles of reasoning that link their beliefs to reality, through reliable chains of evidence and argument. This is how norms of rational thought are made effective... The answer to the question "What should I believe, and why should I believe it?" is generally a scientific one.

Once a person accepts the premises upon which most religious identities are built, the withdrawal of his moral concern from those who do not share these premises follows quite naturally.