Whenever and wherever Christians are martyred, Christianity flourishes. These Afghan clerics should study world history more.
This is generally true, but sadly, not true in Mohammedan lands. Turkey, which was once the heart of Eastern Christendom, is now 99.9% Mohammedan. And Mohammedan lands are notoriously difficult to evangelize, as this case makes clear.
Mohammedanism has only been removed by force, as when Catholics drove the Mohammedans out of Spain and other parts of Europe.