If they call you a racist, there are only two responses that are appropriate; "Fuck off" and move on, and mocking them relentlessly. You aren't going to logic anyone away from that position because logic isn't the point. I have seen plenty of them get derailed simply by the "DAS WACIS" meme because it breaks their puny little minds.

When it's the media and establishment hacks using it as a cudgel, the appropriate response is to ignore it and keep the conversation focused. Engaging is what they want. Don't by into their conceit. The "well acksually you're the real racist" is boomercon loser talk. You cant respond to rhetoric with dialectic speech. Calling them a pedophile would be more effective.