Up to you? I used to hang out on a WN part of reddit back when that was allowed and debate people but that's not a thing anymore. The problem is you have utterly no idea if you're getting through to anyone. I do feel like people had to back off their angry racial ideas and adopt a softer "racial zoo" argument that made it seem like all they wanted was to preserve racial diversity rather than eliminate any particular race. I mean at times I wonder if they were looking in the mirror going "is that really why I have this swastika tattoo?" but I have no idea.
I do think the far right cannot survive much scrutiny of its ideas because they are very irrational, but to be honest the left has done a terrible job pointing this out. I know many people even on the moderate right feel like there's a grain of truth to racism that they'll admit in private with other white people, but then once you confront racism and question common assumptions about race* all that falls apart. Many attack racism as a moral failing and that doesn't work because it makes it sound like the truth is being suppressed for moral reasons.
*The most pernicious being the idea that a person can have a single race on a fundamental level that isn't up for debate