Here is the actual street sign in Brownsville referenced in the letter to the editor by Gene Novogrodsky. Is this a civil war soldier, or is it a Ku Klux Klansmen? If you live near Brownsville Texas you can get up close and personal with the depiction. Thanks to Ruth West and all others involved in bringing the photo to Writers of the Rio Grande.
Personally, we at Wotrg do not see any Klan activity here, and I think any conspiracy to place Klan imagery before the innocent folk of Brownsville is dubious in the extreme.
Here is the original post by Gene Novogrodsky April 27, 2017.