Is bullet-proof glass safer than regular glass?
Both you and the gunman are behind bullet-proof glass. The bullet-proof glass will not save you.
You are the pope. You are being ferried around in the papamobile (which, for the record, is one of the models made of bullet-proof glass. And several mechanical bits too numerous to mention). El Papa is secure, no?
What can penetrate bullet-proof glass?
The Pope would be all up in his Catholic bid’niss, blessing and genuflecting all over the place, and then POW! there’d be a freaking ninja with his legs wrapped around the Pope’s neck. The wimmins would be all crying and the mens would be pounding their fists on the glass trying to save the Bishop of Rome, and that ninja with his effed up little shoes would silently snap the Holy Father’s neck and then somehow blend back into his environment and escape through the ventilation system.
And that is why bullet-proof glass is useless.