Those who aid and abet Nazis are Nazi sympathizers, by definition.
Most conservatives here aid Nazis by running interference for them. Every time we point out Nazis are bad, they run to help the Nazis by making up fake stories about how liberals are just as bad. That means they're running cover for Nazis, which makes them Nazi sympathizers. They're like the GoodGermans who declared that since a Jew somewhere was bad, the Jews and Nazis were equally to blame for the problems.
The majority of modern American conservatives are now Nazi sympathizers. On this board, it's over 90%. If you ever wondered how someone would have acted in 1930s Germany, just look at how they act now. The kind of people running interference for Nazis now are the same kind of people as the GoodGermans who helped Hitler come to power.