honestly i think its upbringing and social conditioning. men are taught to release anger outward, women to turn it inward. men are taught to protect against others, to fight, to be aggressive and to stand their ground. women are taught that they are responsible for fixing things, that problems can be solved by their own actions (and if we cant solve them we think theres something wrong with us and take it out on ourselves), that we are less important than others. women also are taught to empathise whereas men are not and tend to be more centered around themselves rather than thinking of others and their effect on those others.
im too tired too say much more so i hope this is expressed understandably at least. sorry.
the only other thing is that i think maybe 'all' is too general. women do commit mass murder and violent crimes too. in fact they commit violent crimes all the time. not as much as men though thats true.
ok thats my 2 cents.