I agree with you, but point out his rampage was alcohol fueled. If he has sworn off alcohol and is willing to be forbidden from drinking and be tested as part of his contract than I think he can get a second chance. I speak as the son of a father who almost destroyed his family with alcoholism when I was a toddler but thankfully got help and never had another drink from when I was 2 (1979) until he passed away in 2011.
I agree if he has rehabilitated himself, there should have an opportunity to redeem himself. But I think there's something deeper here than just substance abuse. Alcohol by itself doesn't make someone violently aggressive. From what I have read, initially, the wife said that Voynov said he wanted a divorce and would stop giving her money as he attacked her. And that this was not the first incident. She evidently was worried about how the gash on her forehead would affect her appearance. Later, her tune changed as she put the blame on herself, saying she was nagging her husband while he was trying to sleep and when he pushed her she accidentally fell into the TV. I just can't help make an inference here and see a relationship where one person is subordinated to the owner practically to the point where one person is seen more as the other's property. I believe people can change into different people, but given how I see this, I can't give Voynov the benefit of the doubt that he is a different person now or that he views his wife differently than before. I don't know the nature of your father's situation, but I'm glad to hear it didn't turn out worse than it did. One of my relatives did tear apart his family through his drinking, though he wasn't physically abusive. His wife offered him an ultimatum, therapy or divorce. And he picked the bottle. Luckily, she had the fortitude and was independent enough to put forth that ultimatum. For some reason, maybe financial, maybe psychological or emotional, it doesn't appear that Voynov's wife did the same. Maybe I would be less cynical if Voynov had expressed remorse, if he had expressed a desire to become a different person, if he had dedicated himself to therapy and counseling. Perhaps he's done that last thing over the past 3 years, but I haven't seen it.