a strong sense of sympathy would make the final twist towards antipathy (if that is the direction the film takes) more powerful.
I suppose you're right.
As long as, in the final analysis, Harrison's actions are ultimately seen as evil (he does kill a lot of people, presumably in cold blood, after all), and that it's not presented as a good thing that he did what he did - I don't care how corrupt
is in this film, even they
don't deserve to die - then I'll be OK with that.