Proselytism means to convert people, to bring unbelievers to faith in Christ. Real Popes used to bless and encourage missionaries to do such work, in fact Jesus Christ commands it in Matthew 28. This guy calls it nonsense.
I doubt that Popes urged people to use unscrupulous means to convert people. Please read the two definitions. Very different.
You are confusing proselytism with evangelization. These terms have experienced a certain semantic splt in modern times, especially as proselytism has criminal connotation in some legal systems, an thus has acquired a bad connotation even in casual speech.