What is less clear is how much is truly aggressive and how much is pretty micro — whether the issues raised are a useful way of bringing to light often elusive slights in a world where overt prejudice is seldom tolerated, or a new form of divisive hypersensitivity, in which casual remarks are blown out of proportion.
This is a debate that is important to everyone. If we are allowed to over-define racism, free speech dies. If we under-define it, we allow racism to fester and regain acceptance. We walk a perilously fine line.
Please read all the way through an article. The last five paragraphs mark the beginning of a rebuttal to how far the concept has gone.