Inflammation is about getting rid of the trigger of damage and then repairing the area of damage. (Unfortunately the CNS is not great at repair). Now you can look at this and wonder if inflammation is part of the cause of the damage, which you can show in cell culture systems.
However, there are a few people who think that inflammation is present because it is clearing up the damage from some other cause. Some call this "Protective immunity". If you believe in the former you try and stop the inflammation and aim to protect nerves from further damage or if you believe in the latter you do NOTHING about the inflammation or even try to augment this, as the nerves are doomed anyway and you should be able to find areas of marked nerve transections without inflammation (which does not appear to be the case, such as found when you do bone marrow transplants and the recipients unfortunately dies or the early lesions) and that immune suppression should do nothing or make disease worse (which it does not usually appear to do).
Whilst this inflammation can mean T and B cells to some and macrophage and microglial reactions to others, I think it is prudent to try and do SOMETHING and investigate this rather than do NOTHING, when clearly sticking you head in the sand or
worse, will result in no progress and Nothing will change.