But this isn't a new problem, is it? We have a plethora of books, essays, documentaries, and museums examining that very subject. For that matter, many modern nazis are not shy about articulating their reasons - desire for collective identity, desire for power, difficulty with women.

If you'd like some reading material:

The Rise and Faull of the Third Reich by William L Shirer - the single best historical overview

Anti-Semite and Jew - by Jean-Paul Sartre - an examination of the fundamental dynamic of nazi ideology

The Nazi Conscience by Claudia Koonz - examines the nazi worldview in detail

Kill All Normies by Angela Nagel - examining the intersection of chan culture and far-right ideology

* What we have with Daily Stormer is a quite literal database of interactions of people who self identify as Nazis... I'd say deleting it is not the most productive thing we could do with such information.*

True, but it's not some petri dish that you can keep isolated in a lab, is it? You have to balance the benefit of what you might learn against the costs that their organizing activity imposes on other people.