Answer: Don't you think they would've been scared out of their minds that if they showed support to their African American friends, that they'd be next? Think about it! There was lynching and arsine among other horrible things, the KKK instilled fear in everyone and had a set agenda. Eradicate African Americans and anyone who stood in their way. This I believe would include any white people who supported African Americans.
Explanation: It's such a disgusting piece of history, but it's necessary to learn about so that we can attempt to grow and heal as a nation. I urge you to try to learn as much as you can my friend! XOXO