For context, a Twitter user by the name of Hazukari had a lot of allegations of sexual assault (Such as preying on underage girls, or outright raping someone who was drunk) levied against him, though he had also commented on Vic's behavior in the past. Anime News Network cut ties with him, and since Hazukari was being held accountable for his actions, some of the reactions were that if all this attention could be put on Hazukari, it's only appropriate for people to be consistent by putting as much attention on Vic.
So, this behavior hasn't come out of nowhere. It's very much a part of Me Too, where women feel comfortable sharing their experiences, either because they know that other women have been victims at the hands of the same individual, or because they know the men who preyed on them aren't the only ones guilty. In Vic's case, it's been an open secret that his behavior is inappropriate, though I don't believe that allegations were ever this serious before?
The only other precedent for Funimation publicly cutting ties with a voice actor like this was after Scott Freeman was convicted for possession of child pornography. It's likely that Vic is being held to the same standard, and I'm inclined to believe their judgment in their investigation.