I just found this video of Don Black's (the guy who runs Stormfront) son denouncing white supremacy:
https://www.youtube.com/watch?v=FCibIwu0Z30
When asked what made him change his mind, he oddly didn't say arguments, but community (environment). I knew this for a long time, but I finally found it merited to make a thread on /pol/ about it. That political conviction doesn't depend on arguments or logic, I noticed when looking at people of high intellectual capacity. For example the Germans Hilbert and Teichmuller. Hilbert had Jewish colleagues and friends, and consequently denounced Hitler's policies towards the Jews. Teichmuller on the other hand didn't, and he supported them, he even asked Hitler to volunteer for fighting on the Eastern Front, which Hitler granted. This is where he died, RIP hero.
Likewise with the Jews, Neumann and Grothendieck. Neumann grew up in a rich banking family, and was fiercely pro-capitalism, Grothendieck grew up among leftists and was a leftist, two seemingly opposed world views, even though both were Jewish and highly intelligent. Another case to mention here is Bobby Fischer, who lived in social isolation and sought the pure unadulterated truth, which he found and thusly became an anti-semite.
I had a case in my life happen to me recently. I met a girl last year who came from a leftist environment, yet she was smart and we fell in love. She went back to her home country, we started a long-term relationship and we argued back and forth about politics where I debunked all her leftist arguments, regarding liberalism, Christianity, Jews, multiculturalism, multiracialism and islam. In the end she said to me "I am unable to counter any of your arguments, but I don't want to be like you". If she took the redpill she would've lost her entire social circle, and that ultimately wasn't worth it for her, not even for the truth, and eventually we broke up because of it.
All of this goes to show one thing, that political conviction is chiefly informed by environment, for the simple reason of human selfishness. People adopt the political stance that will get them along in life, and cope with the cognitive dissonance later. People are perfectly capable of holding contradictory beliefs, if they never bother to resolve them.
Consequently, we can convince only those people, who think they stand to gain from our policy. People who have close non-white friends, like our unfortunate Derek Black in the video, or God-forbid even have a non-white spouse, will be unconvinced or even oppose us. This is also the reason why rural communities are more right-wing than urban ones.
What this means for us practically, is that if we want to win, we need to invest equally into discouraging people from counterproductive environments (cities, non-white social circles, liberal colleges), as into arguments, because even the best arguments can only convince those who are ready to receive it.