Actual exchange that happened during my first marriage:

Brother In Law: [tells a racist "joke"]
Me: not cool. you won't say racist shit around me.
BIL: or what?
Me: or I won't be around you.
BIL: it wasn't even racist
Me: yes it was. you won't do it around me.
BIL: whatever. (under breath) bitch.

Later, at Thanksgiving dinner:
BIL: [tells a second racist "joke" at the dinner table]
Me: [gets up and gets my keys and prepares to leave]
Mother in Law: where's she going??
Husband: I don't know. Lana, where are you going?
Me: I'm leaving.
MIL: why??
Me: ask your son.

Then I left. Later that evening I got an apology from BIL, and a promise to not say racist shit, at least around me. He tested it a second time, at a different family get together. I got up and started for my car. I got an immediate apology from him for his behavior.

Look, it's not a lot. But it's a start. Stick to your guns, folks, particularly around the holidays. Hold them accountable for their racist words and actions. Deplatforming racists works.