They want my wife and children dead. If they are near my family, they pose an existential threat. I will leave saving the proverbial souls of neo Nazis to others. I am interested in establishing that my family is off limits and dangerous for them to so much as look at.

Would I throw a punch at a confirmed Nazi? Without hesitation.

Some people learn to shed the racism from their heart and become better people. Some will only get so far as keeping quiet because they are afraid. There will always be severely racist people. It is just as important that they feel unequivocally unwelcome as it is to change those who will change.