My brother is of the same character. He only wants family when he needs something. Bail, money, shelter, etc. If you put him on a game show called good decision/bad decision, he'd bat 1000 at the bad decision. Incapable of good decisions.
When your usefulness to him is finished, he acts like a psycho.
But he's not evil. Just a complete dumbass. Selfish to his core.
That said, if my brother did what yours just did. I'd probably make a trip to Florida in person, take him for a meal and explain how bad a decision it would be to ever show his face again. And if he did, I'd treat him like my worst enemy and make sure he couldn't repeat if he wanted to.
My brother, thankfully, understands what would happen if he crosses a line. He doesn't just believe I'd finish him. He absolutely knows it in his heart. I love him. But if he hurt anyone in the family, I wouldn't hesitate to turn that page.
Thankfully he shows restraint thus far. Hopefully your brother will not repeat. I'd not have told mom about any of it.
