When an (ex-)enemy tells you how to defeat the enemy, listen.

An ex-Nazi speaking to AFA (antifa) in southern Sweden had this important information to share:
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AFA: How do you think that one should respond an organization like the Nordic Resistance Movement?

Ex-Nazi: The best way to work against an organization is through being in solidarity in the work against them, to always prosecute them even for trifles, to make life so difficult for them that they eventually turn on each other. To continue exposing them not only online but on large posters around town, simply make it difficult for the Nazis to be Nazis.
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From my translation https://b9ace.noblogs.org/post/2017/10/14/afa-antifa-helsingborg-martin-karlsson-tells-about-its-defection-from-nmr/ in 2017. Translation accuracy approved by interviewee.

This is entirely in line with what I have been told by other ex-Nazis that have gone on to become active antifascists.

Some will claim only [one specific method] works, but it takes a multitude of methods, a diversity of tactics, as all humans and situations are different wherefore which method is the most efficient varies.
So, to "make it difficult for the Nazis to be Nazis" combined with defection program(s), prevention, &c are all essential for any complete toolkit to be used as appropriate.
Anyone claiming any of those must be removed thereby acts to hamstring antifascism.