Young adults coping with Dad

Dear

i am sorry to hear of your husband’s diagnosis and hope that he is receiving the correct support from the palliative care team in addition to his palliative chemotherapy as they have much to offer you at this difficult time for your family. 
as for your son’s reaction I don’t find it that unusual. I think boys growing up get this idea that it’s always their job to fix things and when they come up against something like this where they are essentially powerless, it generates an intensely emotional reaction of which they have no way of responding to adequately. So as his mother you are bound to be first in the firing line to absorb his anger and frustration. My advice is for the two of you to put your energies into working as a team, involve him in organising practical things to help your husband maintain a good quality of life and resist  the temptation to do everything yourself, don’t try to protect him from what is happening but instead include him as much as you can in helping your husband have as normal as life as possible. Men in general deal better with these situations if they feel they are “ doing” something constructive rather than sitting on the sidelines as a spectator, which just increases their sense of frustration.