You sad people lack critical thinking skills. Lets start off with Oros goals. Goal: He wants to learn all the jutsus to figure out the meaning of life. Some could argue that he wants power to control people. He never said he wanted power, its a stereotype that most baddies want power to be the king or whatever, Oro wants power for knowledge. Methods: This is where people get confused, his methodology. Yes he uses people and kills his subordinates, but look at who most of his subordinates are. They are stupid ass kids who want power (sasuke). They want power for selfish reasons. You also have to look at the morals and values of the ninja. Ninja are tools to be used. Oro is just doing what society taught him to do, use people. You could say that hes bad because he snuck around to abduct his fellow villagers. From Oros view they are just simple minded fools that live for no reason other than to live. They do not seek knowledge and he knows that if he wanted to do the tests in public that it would be immoral in the eyes of konoha. Although his methods might be considered evil the big picture is that he wants knowledge and a purpose for living.