If we expand that type of thinking to others does that mean that Lemmy users are overwhelmingly Nazis because they have been so outspoken against them?

Would they overwhelmingly support waving a crooked “X” around? No. Would they support a tyrannical system maintained through fear and violence where people are separated into in-groups and out-groups (and excuses are always found to put the most vulnerable people into the out-groups) and mass executions of those out-groups are considered acceptable? Unfortunately, all signs point to “yes”.