oh, so there's the root.
you perceive the kyuubi as inherently evil, so you judge his actions and words to fit that scheme of yours.

if you step out of that, and try to judge him from a clean state of mind, you might form a different opinion.

which is to say, that you can choose to interpret his words as "evil" or as "not evil, just somewhat of a jerk", depending of that, your impression of him will change.