You said it depended on "your" (which I took to mean "ones own" rather than specifically referring to "me") ethical system. If there is an absolute morality, then the morality of any given action is not dependent upon the morality subscribed to by the actor.

[edit] Furthermore any statement about an action being moral or immoral that doesn't explicitly reference a moral system is implicitly assuming a moral system. I find "It is my belief that X is moral" to be stylistically inferior to "X is moral" and clearly the former is a factual statement, while the later is a statement of opinion. HN is a discussion forum in which stating opinions is acceptable, so I use the terser, stronger statement of opinion preferably to the more verbose factual statement.