My Mom wants our brother to visit her. She isnt doing well and she is moving on to hospice soon. Here’s our huge concern: his presence always brings the house down and he usually leaves yelling threats on his way out. Of course I want to honor my Mom’s wish but even my Dad is leary. Oh dear. What do we do? How do we even process this request?
If that is possible there might be a good chance that he might better behave.
If that is not possible could you ask the Hospice Social Worker or Chaplain to be there to help the situation? Again brother might be on better behavior if there is a "neutral" party there. It might even be possible that mom could be moved to the In Patient Unit for "respite" so that brother again would be in a public space and less likely to cause problems.
All this might not be needed if your brother is facing the reality that mom is on Hospice and is in fact reaching the end of her life it might make him see things in a different light.
People do this in divorce issues when the soon-to-be ex is entering the home to collect belongings, etc. It might be worth the expense in your case.
Or you could just say no, you and dad are not having brother to visit, and that's that. It isn't as heartless as it may seem, considering that your mom deserves protection from anyone who would harm her by word or deed.
I hope it satisfies her desire to see him. Nobody deserves your brothers nonsense.