^The rest of it is more or less understandable as part of human nature and rationalization (even if it's totally unbelievable). It's only the idea that they can't rationalize away the existence of death before sin that's actually astounding to me.
One example of how to rationalize it: Before Adam, there were no souls, so there was no reason to be concerned about death; it was simply a change of being. I've actually seen this idea that there were other humans besides Adam and Eve around, but Adam and Eve were the only ensouled ones, and their descendants were also ensouled by relation to A&E.
Instead, we get this knee-jerk rejection of the whole idea that death could have existed before God magicked Adam and Even into being, because it took them sinning in order to create death.
Does anyone else find that an expression of egotism? "Humans are so awesome that we can even screw up God's plan for the universe by sinning."