Proselytism is what the Jehovahs Witnesses do
Its also the vast majority of postings on the Religion Forum from certain sectors.
It is also what Christ commanded His disciples to do, what they did on Pentecost, Paul did throughout the known world, what Christians have done to the corners of the earth for thousands of years, into the deepest jungles, deserts, islands, etc., and fulfills the prophecy that people from every tribe, tongue and nation will worship Him.
The Pope is making a distinction between proselytizing and evangelizing. Its a distinction lost on most.