Im not sure if you mean ethical nihilism is apart from plain nihilism. First let me mention that plain nihilism fails to consider itself under its own definition. Correct me if Im wrong, but nihilism believes that nothing has any meaning or purpose which would include nihilism itself. Some one argued that there is not absolute truth, then I asked him, "Is that the absolute truth?" and he had nothing to say in response.
As for morals, right and wrong are subjective judgments. As we know what is right for one may be wrong for another. Morals are important for conscientious accountability as to not excuse unacceptable behavior. Nihilism is based on pseudo-intellectuality and appeals to the intellect that resents societal structure and attempts to undermine integrity and authority. This stems from a mind that is dedicated to being "right" rather than truth.
However, what nihilism points out that we too often forget is that originally everything is nameless, but it fails at recognizing the usefulness of the frame work society uses to guide us where to go from here. Nihilism offer no alternative to how things should be done.
