Attacked by cat

Please be kind, because I’ve been extremely upset over this situation.. I have never been one to give up an animal because I believe once you adopt them, they are family, but something happened today that is extremely upsetting to me.. we took in a feral/stray cat at the beginning of November.. he has not been getting along with our other cat that we’ve had since 2015 so we’ve been keeping them separate. The new cat has been sooooooo patient with my son but he keeps trying to attack our other cat. Well today my husband attempted to get involved in a cat fight, which yes, I know was a mistake.. but he was trying to protect our other cat and he knows I get upset when they fight. Anyway, after he got them separate and was attempting to hold the stray cat, he attacked my husband.. he bit him so bad and wouldn’t let go. It was not like it was an accidental bite, because the cats were already separated. My husband was bleeding so bad that he had to go to the ER. My husband is used to having cats.. I am not as much (I grew up with dogs), but he said he’s never been bit this bad before and he does not want to keep this cat. I am very upset at the thought of giving him away, but I’m starting to think maybe my husband is right. What if he attacks my 4 year old like he attacked my husband? He’s a bit unpredictable. I will add that he has not been fixed yet (we ended up getting Covid before we could take him in.. plus we have been low on money due to the holidays).. so maybe there is hope that he would tame down. I worry if we do try to take him to a shelter, they will just put him down if they know he attacked a person. 😭 He was soo gentle with my son that I think he would probably be good in a home with no other cats, or maybe after he is fixed he would be less aggressive but I’m afraid to take a chance with my son (my son loves to hug and squeeze him, and although he has never hurt my son, he does growl a bit and give warnings, and my son just keeps wanting to cuddle him). Anyway, I’m wondering if anyone has any advice. I’m not sure my husband will change his mind about keeping him, and with the looks of this bite, I can’t say I blame him. It’s pretty bad. But if I have to surrender the cat, what do I even say? It just breaks my heart and I feel terrible about it. We took him in as a stray in our neighborhood.. he has extremely skinny, had fleas and worms, and his leg was broken and had healed wrong so he walks with a limp. We took him in for treatment and shots and to check out his paw.. I knew we probably couldn’t handle another cat but I couldn’t let him stay out in the cold. Now I’m attached to this cat but I’m a bit terrified of him too. I just don’t know what to do 😩😭.. any advice would be appreciated.