Forgiveness

I received an email informing me the importance of giving forgiveness before 10th of Muharram. My brother continuously uses foul language when he gets angry and has several times threatened me and my family to the point where he threatens my life.
He asks for maaf but the cycle starts all over again and I sometimes fear for my family’s safety. My sister also fears him because of a very, very nasty experience with him.

Do I have to ask him maaf as I was told to make amends or can I avoid him because he does not even visit our parents?