Unbelievable?
Would you prefer that all the Vatican Guards mount up on horses, get out their armor, swords and spears and ride off to the Middle East (again)?
You're probably not Catholic. There is nothing unbelievable about the Pope apologizing. The Pope would prefer that we all love every single Muslim, which we all should. After all, that's what Christ wants us to do.
Except he did not apologize, nor should he.