But its the other way around isn't it, the "affronter" is the believer, the atheist is the one minding their own business.
In some instances it may indeed be a deliberate affront; in others it may be thoughtlessness. You wish to have the person recognize their remark might offend. Why not ask, "Does anyone ever take offense when you say that?"
I see a great difference between simply avoiding confrontation with someone not likely to understand you and "backing down and being rolled over." I do not feel obliged to have an argument with or reply to every idiot who tells me "Jesus loves you."
How about, "I see you have been hallucinating again."
The Flying Spaghetti Monster loves you.
Lurch always DID have a way with words...
Yes I know, That's why I had to find a new lawn service. I'm not into guys.
Not bad ... not bat at all!