My father is a Muslim however, he is no longer practicing. He also denounces key beliefs of Islam like fasting, salah, hijab and Islam as a way of life. He, in essence, hates Islam. He drinks and goes to clubs but still claims to be Muslim. Me and my 15 year old brother have not spoken to him in 4 years due to the fact he has admitted he wants to bring us down with him off the straight path of Islam. He is a very manipulative man and has already brought his cousin and sister down with him. He was also not good with my mother and cheated on her while they were married.
Is cutting him off the right decision for a vulnerable 15 year old boy. Or should the my brother remain in contact with him.