Alas, I don't think this will be the net effect, John. You've got to remember, most of the fundies in America already preach that the Catholic church is the tool of Satan, and the Pope may be the anti-Christ. This may drive away some Catholics, but they're not the problem, in this country.
I just can't help but keep imagining if this were a global, obscenely rich and powerful Muslim institution, embroiled in child molestation and money laundering scandals. How it might get a wee bit more coverage in the Christian Western world.