Excerpt from Mr. Adnan Oktar's interview on A9 TV, 7 January 2013
Surah Al ‘Imran, 104
“Let there be a community among you who call to the good, and enjoin the right, and forbid the wrong. They are the ones who have success.”
“Forbid the wrong” In other words 'amr-bil-maroof-wa-nahi-anil-munkar'. Allah says there should be Muslims doing that, while the others are preparing the stage, in the background, dealing with the needs. It is an obligation on all Muslims, but since all of them cannot be doing that, there have to be some people taking care of the logistics, so Allah has ordered this division of tasks. Communicating the message of Islam is an obligation on all Muslims. Everyone should be doing that.