When one side wants to harm and victimize and subjugate innocent people, there is no "common ground" with them. You can't find "common ground" with Nazis and other fascists. The only way to do so the fascists would ever find acceptable is becoming fascists yourself, and supporting their abuses, and even then more often than not it's just a delay tactic until you're on their list for abuse.
Nazis aren't interested in "understanding". They're interested in hurting you. That's it. There's no debate or discussion to be had. They have to be opposed by whatever means are necessary, up to and including violence, because the alternative is that they will do even worse to you and others, forever, because that's their entire ideological outlook.
Appeasement doesn't fuckin' work, and it takes a sympathizer to argue that it ever could.
I don't have to find "common ground" with pedophiles.
I don't have to find "common ground" with rapists.
I don't have to find "common ground" with wife beaters.
And I definitely don't have to find "common ground" with Nazis and other abusive fascists.
And I take significant offense at the suggestion that I should.