He has had the grim task of having to tell parents their child didn't survive after a night of excessive drinking. He is experiencing his worst nightmare because the doctor told him--had Cody not realized the labored breathing, Rocco was minutes away from coma or death. Dante is emotional. You are right Rocco deserves to be punished and held accountable, but what parent would lecture their child in their hospital bed? It wasn't the time.
Lastly, Dante is still grieving Sam. The woman he loved died tragically. It makes sense to me that he would lose his 💩 on Gio and I hope he does the same thing when Danny apologizes because the entire thing was his idea. Let's see what Super Jase does once he gets back from his carnage tour.