When should a domestic abuser be fired from work?

The me too movement and the current publicity over Rob Porter has had me wondering about the situation of firing someone over abuse allegations in their personal life, which they haven't been convicted of or charged with. The behavior is reprehensible and I'm not saying that I think it should be tolerated. And, I can see where the decision in the entertainment industry, where the offender is high profile, is straightforward because of bad PR. I guess the same factors apply to working in a White House position.

But, in general, should someone who has been accused of abuse in their personal life be unemployable? In Porter's case, Kelly is at fault for vouching for his character, when he knew about the allegations. But, on the list of horrors of the Trump administration, for me this is about number 50,000.

I think this off with their heads mentality yields an environment, where it's possible to frame a potentially innocent person, like Al Franken. Porter doesn't appear to be innocent, and I'm glad for the Trump administration to be sustaining damage for ANYTHING, but when I see the amount of time MSNBC has given to this yesterday and today, I don't really view it as a positive thing.

What do you think?