In laws are neglectful!!??

I feel like my in laws are neglectful to their kids, and I don't know what to do. I've made comments to my husband voicing my concern, but he doesn't really seem to see the harm that I do. I'm assuming because he was brought up the same way his siblings are being brought up. They have 2 kids still at home, their boy is 11 and their youngest is 2. I've witnessed them put their 2 year old in the bathtub leaving her unsupervised for literally an hour. Not getting up to check on her when she started crying, I literally had to get up to check on her because they just ignored her cries. Then they just got her out. Anytime I've witnessed a "bath" they leave her alone and don't actually wash her they just let her play in the water while they're in the living room. Their oldest left at home was "homeschooled" starting his 1st grade year but they don't actually teach him. He's very behind academically, can't even add and subtract accurately. Can barley read/spell. He acts like he's grown. Curses at his parents, goes out with friends and doesn't tell them and they don't care. He kicked his little sister in the ribs a few days ago and all his mother said was you know better than that. I've heard him make some very concerning comments, I think he needs a therapist for sure. But his parents aren't at all concerned, basically tell him to suck it up. I've witnessed them both being emotionally abusive more than once. She's also currently on probation for assault. The father drinks, and I mean gets wasted 2-3 times a week if not more, and most of the time while the mother is at work and he has the kids. Their carseat for the youngest was 2 years expired, my husband noticed when we had the kids one day. WE bought then a new one. I've witnessed the oldest tell them he was hungry, and them refusing to make him anything. And yelling at him for trying to make himself an omelet after because "I'm not fucking cleaning up after you, put that shit away now!" They smoke weed in front of them everyday, which I don't think there is anything wrong with smoking I smoke as well. But they do it in the house with them sitting right next to them. I've just witnessed so much that makes me uncomfortable, and no matter how hard I try I cannot move past it. I resent them so much. I know there are kids out there that have it much worse, but I genuinely feel that this is neglect and these kids need a better and more caring environment. I don't want to call DHR because I know it would cause problems between myself and my husband. We are also the only family they have that would be fit to take them in, but are financially unable right now. My husband also has a criminal record so I don't think we would even be allowed. I'm so torn on what to do. I just want what's best for those babies😢