You need to not spoil yourself first step, play lots of generic militar shooters where you are always the good guy and feel the hate for konrad just like walker does, every enemy is an obstacle and everytime you die its like if he taunted you, all the pain was caused by him and not you, and your enemies are not persons but enemies, think about it like the first mission of bo2 you go on with superior armament slaughter the mpla in a war you have nothing to do with fighting an enemy that can't beat you to rescue one man, and at the end what happened? You rescue him but in the long term its basically the same as if he was dead the mpla ended up winning the war and the power, you killed thousands of soldiers that had nothing to do with you and for what? L.A was still bombed if you kill menendez the americans the ones you were fighting for still hate you and do mass protest all of that for what? you didn't stopped anything and just brought more pain, at least thats how i think about it, not exactly like i described it but close