Why does the Klan have resurgence on popularity in the early 1900s

Explanation:

Although the KKK had reemerged in the South in 1915, it wasn’t until after the end of World War I that the organization experienced a national resurgence. Membership in the KKK skyrocketed from a few thousand to over 100,000 in a mere ten months.

Squared Local chapters of the KKK sprang up all over the country, and by the 1920s, it had become a truly national organization, with a formidable presence not just in the South, but in New England, the Midwest, and all across the northern United States.

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