Most xian arguments comit the 'god of the gaps' logical fallacy. They assume that simply because the atheist cannot completely answer there argument then their sky daddy must exist. So for example they argue that because atheists cannot explain where there universe came from their sky daddy must have made it yet ignore the fact that scientists of the future might find the answer. Or simply because atheists cannot explain the historical evidence for the resurrection* then Jebus rose from the dead. But how do they know that historians of the future wont invent a killer argument that nobody at the moment has thought of?
Infact atheists are less arogant and more open minded as we simply aknowledge that we dont know. Now i dont meant that we dont know in the classical sense (as in we are not agnostics) and we know that there sky daddy doesnt exist just as we know that fairies dont exist at the bottom of our gardens. But if we dont know then we should know it isnt true. I think that makes sense.
*Actually atheists can explain it quite easily, but lets pretend they cant purely for arguments sake.