Proselytism
Proselytism, the practice of proselytizing, involves actively and illegitimately seeking and inducing people from one religious faith, e.g., Orthodoxy, to convert to another one, e.g., Protestantism. People converted this way are known as proselytes.
The English language word proselytism is derived ultimately from the Greek language prefix 'pros' (towards) and the verb 'erchomai' (to come).