The brainwashing the store clerk has had is an amazing thing to see materialize. It's like something out of The Manchurian Candidate - and there are millions under the same influence.
Now imagine if another pope like St. Pius X was elected and he and the hierarchy started preaching the faith and doing the job they're supposed to do, can you imagine what the millions (billions) of people all over the world like this guy would do? Talk about blood in the streets!
Then the good would be martyred, the Holy Father would suffer much and various nations would certainly be annihilated.