Not a Radical View
Even if Abdul Rahman is not executed by the courts, the extensive attention given to his case places him in eminent danger of facing murder at the hands of devout Muslims taking Shariah law into their own hands. This is not an obscure doctrine kept alive by a radical few. A conversion away from Islam makes that person worse than someone who never believed (Infidel) in the eye of the devout Muslim. Death is commanded by Allah through the prophet Muhammad. So the devout Muslim sees any "mercy" extended to Abdul Rahman or any of the thousands of other ex-Muslims around the world as against the very will of their god, Allah. (It can only be seen as mercy if there is in fact a transgression of the law whose due punishment goes unmeted.) And to kill Abdul Rahman is the utmost in Islamic piety.
Again, this is a central Islamic teaching.
Final judgment is left to God himself. In fact, the book of 2 Peter in the Bible clearly states "The Lord is not slow about His promise, as some count slowness, but is patient toward you, not wishing for any to perish but for all to come to repentance."
Don't lazily reject all religions simply out of prejudice. Be intellectually honest and examine the actual claims of the religions themselves. Make your decision from an informed position. Examine the founders of the religion. See what kind of people they were. Take the teachings seriously and consider what kind of ideal follower each religion would produce. Look at Jesus himself. Look at Muhammad himself. See what kind of lives they lived. Then make your decision.