Over on PPD, AskFeminists, and other similar subreddits it seems like when they talk about misogynists/misandrists; they seem to be under the impression they just popped up in some kind of vacuum and hate women/men for no reason.

People become misogynists and misandrists because of repeated bad experiences with the opposite sex. These negative experiences usually happen at younger formative ages where your psychological constitution and personality are being molded. And these negative experiences happen frequently enough to form a long lasting impression in your mind that the opposite sex is something to hate, because they have treated you poorly.

Its not exactly hard to figure out...

I'm a firm believer in determinism and think there is a reason behind most things people do. Each action, each thought, is intertwined in a complex web of events that preceded it. If someone hates the opposite sex, is it really so hard to fathom that they have thier reasons for it?