Fate: stay Night. Blades infinite edge (Fate Stay Night: Unlimited Blade Works) (№ 395593)

If you're fighting against their will, then every crime on your conscience, make them part of your ideal, but if this desire you have someone adopt your ideals is just silly fantasies, to battle need a reason but that reason may not be ideal, fighting for the ideals you'll only protect them, helping others have nothing in common, the reason for the battle is the willingness of someone to save, at least for you, Emiya Shirou.