I can add to some of these answers. Suppose they ask me if I would like to live forever in paradise on Earth. Now, I can explain that if I do, then it's part my duty to create that paradise without any help from any God--and part the duty of external authorities especially God to leave me alone so I can create such paradise. I believe that, if the earth is going to be a paradise, it will be through science and the free market, not through any God.
And, if they tell me that the "wicked" will be destroyed, I might ask them what constitutes "wicked". They will come up with something like "Those opposing God's kingdom". I would simply reply "What about those who study God's word but refuse to join your religion, or those who do not support it but are not actively opposing it". Chances are good that they will come up with something that God will destroy those people, too. At which point I mention that they just admitting that God is going to destroy people that are simply minding their own business, for no good reason other than because they refused to support a particular group in a particular way--and in doing so will throw away other talents (such as rebuilding a paradise and creating new infrastructure) just because they did not want to preach or were lousy at doing so.