I don't think it neccesarily has to do with religion or G-d but just spirituality in general, "And he won't be there when Jesus comes around" doesn't have to literally mean Jesus, and if it is about Max then it's odd because he is jewish. This could just be a shot at the character, such that he built up such a defense against religion, thought based purely on intellect, and the fact that he expresses the feeling what's it all worth, that he wouldn't be able to accept anything spiritual.
I don't think it neccesarily has to do with religion or G-d but just spirituality in general, "And he won't be there when Jesus comes around" doesn't have to literally mean Jesus, and if it is about Max then it's odd because he is jewish. This could just be a shot at the character, such that he built up such a defense against religion, thought based purely on intellect, and the fact that he expresses the feeling what's it all worth, that he wouldn't be able to accept anything spiritual.