Racism is believing that some races are better than others.
That's it, there is no rocket science to be had of it. It's a word with a meaning just like any other word.
But then there are words like 'feminism', which steals a definition of another word and termed to confer a slant. And then there are words which are skewed, like 'sexism', which is applied incorrectly due to the new fiction of rigid equality.
The point is, all these changes and perceptions are straight out of the liberal camp- they redefine and reinterpret everything so they can go and call everyone else wrong.