Gabriel.
That is NOT our mother, and you shouldn't listen to her. She's obviously completely cracked in the head if she thinks you're a weakness. You are one of the best people I know, Gabriel, and I don't want you doubting that. She isn't our mother, and she isn't worth you beating yourself up over.
And those- those murderers are NOT you. I don't care how much they look like you, or anything like that. You are not them. You would never be like that. If- If I wouldn't shoot Nathan, like the scarred man did, then you wouldn't kill anyone willingly. I know you well enough to know that, big brother.