When I think of the term “racist”, my definition lies in the former definition and has been eversince I heard of this word when I was a child of the 80s & 90s. The latter definition, to me, sounds like it came from the fringes of the left or an out of touch academic.
So what would you call "perpetuating societal systems that advantage one race and disadvantage another," whether because you're actively supporting those systems or just indifferent about them and indirectly support them as a result? What would you call the system itself, if it's advantaging some groups at the expense of others? What would you call it when someone says a lot of mean, discriminatory things about minorities but doesn't claim to "hate" them or enact violence against them?
I'm also reminded of the famous saying about liberals/moderates: that they are against all wars except the current one and support all civil rights movements except the current one. Pretty much on the nose here.
Hey man, they totes would have been marching with MLK and protesting the Vietnam War if they were alive in 1966!