They're still stuck in the 1st century.
Think about it... when you first start a new organization, you need membership so as rebel8 said, they had to 'spread the word' in order to increase the flock. The agenda is clearly documented in the Bible. If you don't get 'reborn' as a Christian, you risk judgment and eternal punishment/torture. We've got all the answers. Sign up now and be saved. You will have eternal happiness after you die.
I like to point out to Christians that if spreading their message is so important, why are they doing a piss poor job of it? I usually get the offended look. I then say, "Look. There are 7 billion people and growing in the world. Christians amount to about 2.5 billion. That's less than half the world's population. There are people born on this Earth, that live their entire lives and die without ever having heard of Jesus. So I guess they're screwed then?"
Kinda like these peeps:
