There has been speculation that WH is bi-polar. More than that actually, as the condition is listed on his court documents.
You can find them
here and
here . If you look on page 16 of the second link,
you will see the attorney respresenting WH states that he suffers from manic depression (early term for bi-polar disorder) ADHD and suicidal tendencies.
I agree that a sane and rational person wouldnt likely do any of the things youve mentioned above.
Its my belief that were not dealing with a sane and rational person however.
Additionally, there is a documented link between drug use (which WH has admitted to) bi-polar disorder and violence which you can read more about
here,
here, and
here.
And finally, theres also evidence to support that WH may be a psychopath as well.
The following articles tell how to recognize a psychopath by their
speech patterns and also by their
behaviors.