Well, Acqua is, in his mind, trying to save he world of a teenager with a ungodly power in is right arm and definitely not enough good sense to use it properly. So, for the sake of the world, he wants to remove it.
That is quite a @ssholish thing to do, but atleast he is not a villain for the sake of having a baddie oposing the hero. He has a point .. how good of a point he has and how justified is his point for the actions he is taking is a entirely other discussion :/
And yeah, I want to believe