The alternative is sitting down, having a talk, drinking some tea and talking about our differences.
You literally talk in your other reply about how you’ll join them. You can’t just sit down and talk about how they want to kill the jews and you don’t - your willingness to hear them out inherently legitimises their ideas as being reasonable and able to be reasoned about.
I know you don’t fully understand how the way that you say something can be as informative as what you actually say, but I don’t need to assume - you did actually tell me in your comment that you don’t really mind nazis as long as they’re not being violent towards you.