I'd just like to reemphasize what conclusions you should and shouldn't draw from an experiment being invalidated. If an experiment is run that says the sky is blue, then its invalidation does not mean that the sky is not blue. It means we no longer have evidence for that conclusion. The correct answer then isn't the negation of the original study's conclusion. The correct conclusion is that we don't know or aren't sure.
Likewise, if the SPE is invalid, it doesn't imply that average people aren't capable of horrific behavior - it simply means we have less evidence to determine that than we thought we did.
Likewise, if the SPE is invalid, it doesn't imply that average people aren't capable of horrific behavior - it simply means we have less evidence to determine that than we thought we did.