"No, I completely agree with you. It was a shit thing to do, and stupid too." Sam rolled his shoulders. he just wouldn't mention how Dean practically did the same thing with Lisa and Ben. He'd wiped their memories clean and sent them on their way without protection. And that was after they'd been targeted by a demon.
But that wasn't a point Sam was going to bring up. "He should have given you the means to protect yourself. He should have let me and Dean know you, and you should have had the chance to know us." Sam was never going to argue against that. He hated that he had a brother he didn't even know until it was too late.