Desperate to save my family from my brother's behavior

Salam everyone. I'm writing this with a heavy heart and tears in my eyes. My 17-year-old brother is destroying my parents. He has zero respect for them, treats them like they're stupid and weak, yet they've sacrificed so much for us and still do everything they can. All they ask is that he gets a job and shows basic respect, but he won't even do that. He earns money by selling cigarettes, vapes, and sometimes weed. Whenever my dad pressures him to get a proper job, he gets fired within weeks because he only sleeps, eats, plays video games, and hangs out with friends. He's so selfish-he stays out all night with his phone off, takes the car without permission despite having no license, and my dad even found a weapon in his room. He says horrible things to them, avoids family time, and only acts nice when he wants something. My dad's heart is too soft; no matter how much my brother hurts him, dad still worries and asks about him. I know my brother has good in him, but it's buried deep. I'm terrified my dad will have a health crisis from the stress. I'm not perfect either, but I try to respect and love my parents. Today my dad called my brother's friend's dad to check on him because his phone was off, and now my brother is acting like a victim, saying his reputation is ruined. I'm scared I might lose control and hurt my brother if something happens to my dad. I need advice from my sisters and brothers here. Please help me save my family and guide my brother back to the right path.