The world learned an important lesson from the rise of Nazism in the 1930s – that hate must be resisted with vigor and vigilance because appeasing hate is doomed to fail.

One widespread form of hate today, in the United States and worldwide, is white nationalism.

On its face, white nationalism might be a benign term, but even a shallow investigation reveals white nationalist groups are all about the self-preservation of white people no matter what the cost.

In other words, white nationalists don’t believe in the universal principle “treat others as you would want them to treat you,â...