It has been weaponised in such a way that anyone addressing a subject that has any racial element in a way that puts non-white people in a bad light is routinely called racist, dismissed and ostracised. Thus it has simply become a means whereby non-white people are rendered exempt from criticism.
Point out that violent crime is disproportionately perpetrated by black youths? Racist.
Point out that Child Sexual Exploitation is overwhelmingly perpetrated by muslim men of Pakistani origin? Racist.
Raise a concern that the number of prosecutions for FGM remains at zero? Racist.
Question why the Notting Hill Carnival continues to be allowed despite rampant criminality and the need for 7,000 police? Racist.
Etc, etc, etc.
Racism's descent into a meaningless blanket term has been part of a very deliberate strategy to avoid the asking of awkward questions about race.