content: It's possible in the sense that open exchange of ideas leads to new ideas. Like the man said, only Islam can reform Islam. If it continues to stubbornly punish the open exchange of ideas, then reform is impossible. The progression from strict Catholicism to contemporary moderate christianity took centuries. I suspect you can accomplish doctrinal change much more quickly in the information age, but it hinges on halting capital punishment for apostasy. Alternatively, geographic separation of a critical mass of like-minded individuals might work, though it is a little unfeasible in a world where nearly every piece of dirt is claimed by some nation or another.