Yes, the Ku Klux Klan (KKK) has been associated with various criminal activities in the 21st century, although their influence has waned compared to their earlier periods of prominence. Instances of hate crimes, violence, intimidation, and threats against minority groups have been documented. The KKK and similar hate groups have been involved in organizing rallies, distributing propaganda, and clashing with counter-protesters, which have sometimes resulted in violence.
The FBI and other law enforcement agencies continue to monitor such groups, as they present threats related to domestic terrorism and hate crimes. The KKK's actions often reflect broader trends of white supremacy and extremism in the U.S., which have seen a resurgence in certain regions and contexts in recent years.
It’s essential to note that much of the activity attributed to the KKK operates within the broader context of a variety of hate groups and movements that share similar ideologies.