I partly disagree, partly agree. What he is doing now is nothing but a continuation of what he did when he killed his father, and that's the one act in the history of mankind that he hates the most, and he did it himself. So, you can't really say he wouldn't hate what he is doing now. However, he still sees it as a necessary thing because he pledged himself to it when he committed his crime in the past.

It has been also said many times he doesn't enjoy killing at all, and killing is what he's mostly doing these days. Killing anybody who would disturb the uneasy "peace" the British occupation brought. However, there is a difference between liking killing and killing because one must.