Discussing in a moderate - unaggressive and receptive - way is always right. But holding to what is seen as a moderate view on any subject can just mean that you are falling in line with whatever terrible thing happens to be fashionable at the time - as with Terry K's examples.

In most conflicts it's true to say that both sides are to some extent at fault. But that isn't the same as saying that both sides are equally in the wrong, and a "moderation" that insisted in all circumstances on asserting that could seriously distort the truth.