To almeyda:
Christianity is special in the sense that when Christianity leads to radicalism and terrorism, it is referred to as either a "war on evil" or a "misuse of religion".
If we assume that all religions are inherently good (which is difficult, since the difference between a cult and a religion is moot at best), then terrorism and radicalism are "misuses" and does not affect the "validity" (I don't know how you're going to define your use of this word) of the religion.
Patiently awaiting your feedback.
"Respect is like money, it can only be earned. When it is given, it becomes pittance"
™ Version 4.2