Who did that?

Just because you agree that the statues should not be taken down does not make you a KKK sympathizer.

In fact a majority of Americans want the statues to remain-
http://wtvr.com/2017/08/17/poll-confederate-statues-remain/

Are all of them white supremacists too?

The question you should be asking YOURSELF is how fine of a person do you have to be to join forces with the Antifa anarchists, and claim anyone who dares to disagree with you is a racist?