The deliberate attempt to redefine racism is done in order to sustain the fiction that there is more that can be done politically, beyond a reasonable guarantee of civil equality, to alleviate racism.
The direction in the US is to make even more and more insults, slights, harassments and petty outrages to be included in 'racism'. This has taken the form of 'triggers' and 'microaggressions' whose remedies are politically correct speech and 'safe spaces'. The aim is to sensitize individuals to this and then come up with 'solutions'. These solutions will deliver attention, influence, money and votes to their originators who are the Multiculturalists. The redefinition of racism to ever more sensitive levels and calls for a 'national discussion' satisfies the fetishes of 'experts' who would rescue victims of this 'abuse'.
The effect of the acceptance of this sensitization is the induced crippling of the protected class. It sustains what Toni Morrison called the 'dilemma of the rescued'. Ultimately it goes against self-determination, this is why it is subversive and wrong.
Right now and I suspect for the foreseeable future this is just more nonsense and a waste of dignified people's time. It will ultimately become worrisome if and when some tipping point is reached at which time pluralities of Americans believe it is time to criminalize more racism. Currently, the commission of felonies may be considered a hate crime if it is determined that racial animus is proximate cause for the act and/or it is done as a terrorist act of intimidation to the public. If America decides in some future time to add racial scrutiny for misdemeanors, then we will have reached an Orwellian level of dystopia in many ways. Primarily because it will have infantilized the protected class so completely that it will be generally accepted that they need a police state to survive.
The first clue to this kind of thinking has already emerged. It is already widely accepted in the popular wisdom that black Americans calling themselves 'nigger' is neutral, but that a white American calling a black American 'nigger' is an amount of provocation that a black American is psychologically incapable of handling or ignoring. These kind of simple minded double standards are part of the politics of victimology and will always be around, and will continue to take root in weaker minds and flower into vines that strangle self-determination.
It's always in somebody's interest to suggest that 'minorities' are incapable of self-determination without paternalistic political intervention. And of course, it is in those interests to attempt to be racially deterministic. Just listen to them say how African history is inescapable for hundreds, if not thousands of years. Listen to them say how race and racism are an inescapable world altering system.