How can I have his rights terminated
That is often difficult, and in some cases IMPOSSIBLE to do.
My lawyer claims only way to keep him and family away is to have a new father in place. Like if I get married to someone. Is that the only way because I will do it.
Your lawyer is on target, but adoption by another male is often expensive, and sometimes impossible.
YMMV
It is also difficult to find a man willing to adopt a child, even if the man marries you, and difficult to achieve.
Adoption is also expensive.
Sometimes it is best just to leave things as they are, because a man or woman doesn't have to be married to someone to be a parent to a child.
Heck, you found out that even BIRTH parents can do heinous, despicable things to the children to whom they are genetically related!
Is that the only way because I will do it.
You might find that impossible, because someone loves you, doesn't mean they want to adopt your child.
In fact, some people won't marry a person with children.
I understand the hurt you are feeling.
Have you considered counseling?
You didn't harm the child.
The evil demon who harmed the child is in prison.
You have time to determine what you will do.
No need to do something hasty.
You are also free to obtain an order of protection when the demon (if the demon) ever gets out of prison.
You can also move to a new state and keep your location secret.
Talk to your lawyer about HOW that can be done.
I want nothing from the father and his family but for them to go away and never surface.
All you have to do is move far away, and be careful who you tell where you live.
In fact, you can change yoru name and child's name, again discuss that with your lawyer.