By definition, at any given time, someone has to have been the worst Pope to date. Even the worst Pope to date, by definition, is still Pope, but whomever he might be would, as the article says, cause one to reflect accurately on what the limits o the Petrine office is.
There is no need to name names.
The very least Francis could be doing is raising theological questions on the assertions made in the Islamic codex (which is their code of observance and behavior) known as Sharia, Beginning with this question
http://www.theusmat.com/islamandfreewill.htm
Parties with suppressors of the faith
Francis continuing destructive confusing pontificating on temporal worldly social behavior,which has nothing to do with and avoids articles of faith and has rebuked or restrained contemplative religious orders to favor such behavior . But refuses to question and expound on the profound differences with the claims made by Islam and its followers Instead of reaching out to and defending what Judeo/Christian beliefs are. Challenging the claims that Islamist make they are following God’s command using deceit and deception when ruthlessly murdering and torturing non believers and destroy their edifice .simply because of its assertion of being monotheistic. Then winds up making a point of honoring it and placing it on an equal level because of that claim. Is leading to misguided conversions which is the result of my so called Pope playing games with this so called mono theistic cult and a serious fracture within Christianity and The Roman Rite .