Many different clubs or group especially those that are associated with violence wear a costume like the KKK. They wear a coned-shaped white hat and then it covers their face. They also wear a long white robe. That is not to say that all groups that wear burqas or other costume are violent. Some groups of people wear a piece of clothing due to their religion or for other reasons. The KKK is against all religious groups that are not associated with their own.
Likewise, they are also against people of different races as well. The KKK doesn’t see themselves as wearing burqas and they are wearing them for different reasons than those who do wear burqas. Burqas are usually worn for religious reasons.