A recent had some commentary on antisemitism that highlights an issue with defining racism as prejudice plus institutional power:

[A]mong scholars on the left and people who think about hate crimes and oppression in the state, you know, there’s different schools of thought around what it means to talk about hate crimes and to track hate crimes... I think that today in the US, it’s probably not really institutionalized antisemitism. There’s not really barriers to accessing housing, jobs, other resources for Jews. And Jews have a good amount of access to protection by the state and everything. So like, it’s not institutionalized, but there still is this antisemitism that can flare up and cause violence and especially coming from a lot of these white supremacist and right-wing neo-Nazi type groups.

It's a better take to define racism as most people do -- prejudice based on racial animus -- then analyze how institutional power is used to insulate white people from harm while magnifying the harm racism does to people of color.