Tell me how is Ivar evil? Because he killed his brother? Harald killed his brother, Ubbe spared Hvitserk. Rollo betrayed and tried to kill his brother for no reason. Ragnar told him to be ruthless, that means to not care for others, Ubbe never listened to Ivar and denied him as a leader because he fought he was young & couldnt do it so he left, what did Ivar do next? Capture York. Ivar punished anyone who betrayed or committed treason. A normal thing a King & Conqueror would do to assert their power . Lagertha killed Ivar’s mother, he simply wants revenge. Bjorn even said himself “ If that was me I’d want the same thing “. Ivar would have never waged war on kattegat if Lagertha didnt kill his mother .. he was simply happy parting ways with his brothers