What I understand from what you say is: 
You fight Nazis because you are pro-Jewish.
You believe Nazis are people who declare themselves Nazis. 
They are different because they declare themselves different.
Nazi ideology is 'to be different'.
Alt-Right = Nazi.
If people do not respect your right to life, you do not have to respect their right to life.
Modern Nazis have the same doctrine as the original Nazis.

I think that is a fair summary and it has helped me understand many people with the same thinking as you. Please correct me if I'm wrong. Thank you.

NOTE: The causes of WWII was not ideological. The Nazi ideology was tolerated and allowed to exist without any objection until 1939. The Americans only found Nazi ideology intolerable after Pearl Harbour - how strange. The Soviets allowed Nazism to exist until 1942. The Swiss, Irish, Portuguese, Spanish, Swedes etc never had any problem with it. The Italians and Japanese joined them. As did the Hungarians and Romanians.