Ah I see, that clears it up. Well the sheet implies Malkor was conditioned to hate the Tullys and Starks by the Boltons, but the question remains of why a house known as Frey collaborators would be given a Frey ward? Did the Tullys arrange the deal or did the Freys do so? And if the Boltons and Freys were allies in the past why would they torture him? 

Ramsay was crazy enough to do that, but I don't know if the new generation of Boltons would neccesarily be as sadistic or random in their torturing. I don't think he needs to have been tortured to disdain noble families, being born a child of a house beset by scheming and violence would be enough.