Hecate-Greek Goddess of Witchcraft?

Hecate literally means "she who works her will".  Early on she was associated with brightness, but later on writers began to connect her with the underworld and the occult.  But why?

Hecate was a goddess linked to the Titans, an ancient group of deities that ruled prior the the Olympians as I have previously discussed.  Her mother was Asteria, and her father Perses.  She held a special role among the Titans and controlled the sky, land and sea.  She was thought to have the ability to bestow blessings and wealth to those who worshiped her.

Things however took a drastic change once Zeus and the Olympians took power as the Titan reign came to an end.  Instead of imprisoning or banishing Hecate like many of the other Titans were, Zeus allowed Hecate to keep her honors and even bestowed a few new ones to her, such as being the nurse of all the babies who survived to see their second day.  Over time mythology began to pain Hecate in a much darker shade.  She began to be described as a goddess of sorcery and poisoning who brought death and destruction with her wherever she went.  This shift in mythology could be because in a patriarchal society, such a strong and mysterious female deity would have been unfitting and challenging.  

People believed that Hecate inhabited the space between the world of the living and that of the dead. She could cross boundaries that others could not and that was frightening to people.  She was from then on associated with magic.  

I tried to find some neat video clips for you giving a more thorough history of Hecate but all I really found were songs, chants, and people discussing their magical journey invoking Hecate. After all this time people still look to her for magical guidance. I also find it interesting how history, poets, and writers took a seemingly happy, bright, and good deity and felt challenged by her abilities or status and decided to portray her so negatively as to incite fear.  This is pretty common all throughout history with different female figures and still happens today. Who are some other women; people or deities that you can think of that society/history decided to alter out of fear or change? Why do you think people do this and do you think it will ever stop?