To Bluegrass Atheist:
---It is not in God's nature to be a deceiver.--- (assuming there is a God)
No. But it sure is in mans nature to be a deceiver. (No assuming) The bible is filled with human deceit, including to deceive others into believing that much of it is Gods word.
---We all know that the universe works in accordance to a natural order, and it would be deceitful for God to break that order and intervene---
Just the same as it is for humans to pray to a supernatural God asking him to intervene, which is equal to telling an omniscient being that he is a failure and that there is a need to call him out onto the carpet through the ridicule of superstitious prayer. Prayer is nothing less than telling a God that he is incompetent. But that would render existence pointless to know more than a God (not).
---an example being that God could poof a mattress underneath people whenever they fall down, but that would render existence pointless.---
Every single day the supernatural God "poofs" another sun above the horizon to ensure that we live another day. To believe anything different would render
existence pointless (not).
This type of arguement can take many different turns and can be cancelled out many different times. It's called "Special Pleading" which is, an argument that ignores all unfavorable evidence. It is a pleading that alleges new facts in avoidance of the opposing allegations. eg; the mattress.
Well, you will have to use your own words break the dichotomy that your friend conveniently sets up. But that is what he is doing, basically. I don't know how else to describe or explain it to you. That is why many Atheist's just go for the shortcut answer of: Nothing = nothing. There is no need for proof when nothing exists in the first place. Usually that is not enough, though. However, given more and you stand thechance of being backed into a tricky corner of hypotheticals, etc...