If sin causes accidents and illness, shouldn't there be some actual data we can assess?
However, I can see a few major problems. First you have to have a tool for assessing relative levels of sin in the individuals being studied. Then you have to sort out the True Christians from the posers. Finally, you have to determine if there's a causal link between the amount of sin and the calamity, as well as distinguishing it from a low-sin person being "tested" by their god.
IOW, as things currently stand the assertion is unfalsifiable because there are too many variables and too many excuses that could be used to explain away anomalous data points.
However, I can see a few major problems. First you have to have a tool for assessing relative levels of sin in the individuals being studied. Then you have to sort out the True Christians from the posers. Finally, you have to determine if there's a causal link between the amount of sin and the calamity, as well as distinguishing it from a low-sin person being "tested" by their god.
IOW, as things currently stand the assertion is unfalsifiable because there are too many variables and too many excuses that could be used to explain away anomalous data points.