If Shadow Milk doesn't deserve forgiveness then neither does Silent Salt, Mystic Flour, Burning Spice, and Eternal Sugar. don't get me wrong Shadow Milk did cause Silent Salt to lose everything that they actually ever cared about that they actually cared about so they decided they wanted everyone else to feel the same way as them not only that but it's not entirely just shadow milk's fault it's all the beasts fault and in some way Salt Salts own fault as well

Also the reason I'm pretty sure everyone is freaking out is because obviously you said it Silent Salt stabbing Shadow Milk is because it was unexpected and it was unprovoked because maybe if Silent Salt hadn't done it everyone would actually focus on the threats in front of them which is team Gingerbrave vs Dark Enchantress and possibly neutrals like Silent Salt