Yikes...He has a Mars/Saturn/Pluto conjunction, opposed his Moon and square his Venus. And your Cancer Sun is right at the trigger point of that intense stressful T-square.
Your Sun turns that into a Grand Cross. Which can mean that marrying this man becomes 'your cross to bear.' Like you are sacrificing yourself, your freedom, your sense of safety sand security, by doing so.
I very rarely try and caution someone from marrying their fiancé. I just figure people have their own karmic debts and personal situations to play out together.
But I would like to remind you of your own words here:
"
Yes you describe him well --he is a violent dangerous man ..."
You want to marry a violent dangerous man?
("however, not with me")
You do not know that he will never be violent and dangerous toward you. A violent dangerous man is always potentially dangerous towards his wife.
"and is very bitter at his mother. "
Guess what, once you marry him, you become a symbol of his mother. Good luck with that.
Do you believe you would ever be able to walk away from him if he became dangerous? I dont think it would be easy.
He has all the signs of an obsessive stalker that would fixate on you and prevent you from feeling safe.
Please think deeply about your decision. He will demand utmost loyalty from you, which will include circumstances in which he is wrong and doing harmful things to others.
He will likely try and isolate you from others, especially loved ones that worry about your safety.
And your Pluto on his Mars will give him the excuse and justification in his mind, to respond in negative ways because you will deserve it for not believing in him snd trusting him, and being just like his mother. Someday he will see you in the same way hateful way he sees her.