Vain killing produces more vain killing
Vanity ... is just a synonym for ego. The only reason someone would knock down a door rather than wait for someone to unlock it is because ...
Their EGO tells them "how dare he/she not listen to me". Here's the fact that everyone knows: Your ego just cannot handle the fact that your incapable of controlling the actions and thoughts of women. You believe that your gender entitles you to be taken seriously. It doesn't.
Deal with it.