You could try convincing theist we are not evil like me, I help out the local churches when they need it. So far only my friends church listen's to me and are convinced the holy ghost has me. If im preaching which is probobly what they consider me doing, it's humanity, equality, love and peace. I tell them no matter how well you raise your family, no matter what it is you don't do personally to others. As long as you allow children to be worked to death for a quarter a day for the clothing you wear. As long as you allow war and genocide to be commited by your christian nation. As long as you starve nations to death such as colombia for what a few people do. As long as you use the drugs innocent people die for by the thousands. You're going to hell, because it's within your power to stop it. So go ahead and preach jesus, you still commit acts on satans behalf. Willing or unwilling you still do it knowingly, just because it's not infront of you doesn't mean it doesn't happen. Just make them see why they aren't the devoute christian followers of good they believe they are and some will listen. Not all, but some is better than none.
Live every day as if already dead, that way you're not disappointed when you are. 
