Bergoglio's heretical past is what disqualifies him from becoming a legitimate pope as the Magisterium of the Church infallibly teaches.
In Argentina Bergoglio already promoted the heresy of religious indifferentism condemned by the Church.
Bergoglio has said several times that in Argentina he lost his temper over a woman who converted souls to Christ
but declared first to those in Damascus, then in Jerusalem and throughout the countryside of Judea, and also to the Gentiles, that they should repent and turn to God and do deeds consistent with repentance.
Paul Appeals to Agrippa to Believe
27 King Agrippa, do you believe the prophets? I know that you believe.” 28 Agrippa said to Paul, “Are you so quickly persuading me to become a Christian?” 29 Paul replied, “Whether quickly or not, I pray to God that not only you but also all who are listening to me today might become such as I am—except for these chains.”