Friends of mine have a bengal and at times acts rather aggressive. There are behaviours I have witness that have made me think that cats s WILD..... Even the method it uses to climb tree's. Like Rambo charged up!
The cat would bring in dead animals as if it were on a production line! Once brought in a neighbours pet rabbit!
Surely you were aware that a bengal is not your typical tabby cat.
Totally agree that you should have the cat checked up. However trying to condition it to behave like a 'normal' cat is questionable as this cat has some wild temperament to it.