evangelize

verb3

1. •
   To tell people about (a particular branch of) Christianity, especially in order to convert them; to preach the gospel to.

   • his Apostles, whom he sends To evangelize the Nations — 1667
2. •
   To preach any ideology to those who have not yet been converted to it.

   • […] nor is it the task of the Muslim to "evangelize" the unbelieving world. — 2002
3. •
   To be enthusiastic about something, and to attempt to share that enthusiasm with others; to promote.