If their talk after the last raid stream is anything to go by, they'll be doing it after work hours so it's not like it's going to take up any time for other content they could be doing.
And yeah also today might not be the best day to be streaming Murder Island with its hyper realistic weaponry.
Personally, I don't judge how people try to find comfort in trying times like today as long as it's not clearly self destructive. If you're not directly responsible in finding solutions to problems, you do whatever to help you cope with awful events. Self care is good. For Giant Bomb, they can entertain and lift up people's moods.
Just gotta be sensitive, really.