In no way do I support/believe what the KKK stands for. In fact I detest the Klan. However, if other groups are allowed to pass out literature about their beiefs, then under the Constitution the KKK should also be allowed to do so.  Individuals have the right to refuse to take the literature.

http://blogs.riverfronttimes.com/dailyrft/2014/12/kkk_loses_lawsuit_over_handing_leaflets_to_drivers_in_missouri_town.php