Convincing Chritians they don't have to give up what they like about church, only give up fear.
As a former Christian, I think I understand the real problem. Most professing Christians really don't believe. They either don't believe in secret, then outwardly around other "Christians" they profess and act Christian or they force themselves to believe out of fear.
You can see the evidence of this in their arguments for belief. They continually throw out Pascal's wager which really only proves they don't really believe and are just hedging their bets. Also their "There will be no morality without religion" argument only proves they "believe" out of fear. My definition of faith - forcing oneself to go along with something untrue out of fear. All humans have an innate fear of the unknown and death, religion exploits this fear.
The real response to Christians needs to be the following:
1. How to get them to get past their fear of death and what will happen after death. Get them to just accept that we can not know what will happen and just face this fear. Believing in fairy tales of the bible does remove this fear deap within our psyche. All fear must be rationally faced.
2. Convince them they don't have to change their morality. Becoming a non-theist does not mean losing all morality. Instead it means they are free to choose their own morality. Perhaps they could choose the same morality that is taught by Jesus. They can still believe sex should be reserved for marriage without belief in any god.
3. Convince them they don't have to give up "worship". Christianity has poisoned us into thinking it would be wrong to enjoy the awesomeness of nature and the universe. In Christianity only god can be awesome, to think anything else is awesome is blasphemy(remember religion poisons everything). You can be a non-theist that sings and gets the same high Christians get from worshiping god by singing about the wonderful natural world and the joy of being alive.
4. Convince them they don't have to give up "prayer". They can meditate, contemplate the wonders of the universe and get the same peaceful feeling Christians get from "prayer".
5. Convince them they can still have fellowship. They need to know they can still have places to go to find meaningful friendships and fellowship with like minded people.
“Religion is regarded by the common people as true, by the wise as false, and by the rulers as useful.” Seneca