Defending yourself that you are not racist is what they want throws you back on your heels and puts you on the defensive and at a disadvantage. Agree with them
They do want to put you on the defensive but agreeing only allows them to declare smug victory.
Not sure what the answer is except to turn it back on them.
Or just tell them to GYFYS.
[Sometimes I am conflicted that way.]
Don’t agree with them just say “how very bigoted of you”.
I always thank them.
And announce claims of racism are the universal sign that a Leftist has lost the argument (just like Godwin’s Law). Then I tell them I accept their surrender.
Don’t bother “defending yourself”. Since the unhinged Left is using the playground tactic of name calling, throw it back to them at their own juvenile level. Simply reply, “No, YOU’RE a racist!”