We've come a long way in removing Jim Crow and segregation. So I don't believe white supremacy is a big thing anymore. Of course there will always be lynchings, but institutionalized segregation and discrimination is a thing of the past. But you can't change a racist's mind. There will always be racists.
How did Germany fall into the chaos of the Third Reich? It was primarily because of the influence of Adolph Hitler. Without his charisma to sway the German people, it is unlikely that the world wouldn't have taken the path it did. Right now white supremacists are localized and unorganized.
Today, unlike 50 years ago, racism is generally frowned upon. White supremacists are hated by both whites and blacks, and often fight amongst themselves. The KKK now only has about 5000 members in the US. Are 5000 racist ***holes enough to threaten millions of non-racists? If you answered yes... You're an idiot.
They do not have a strong enough group to become a real threat to the U.S. As long as they are not causing harm, or harassment of any sort they have a right to be there regardless of how we might feel about them. The U.S. would do something about it if they start to get out of control.
Any gangs of any color (e.g., Black, Brown, White) in the USA are a threat to the U.S. But, you have to catch them doing crimes to put them in jail.
More than 1.4 million Americans are wearing the colors of more than 33,000 gangs across the country, according to a report by the Federal Bureau of Investigation. For example, the 18th Street Gang in California, Florencia 13, Barrio Azteca, Juggalos, Latin Kings, Somali gangs, MS-13, the Trinitarious, Hermanos de Pistoleros Latinos, the Mexican Mafia, The Mongols, the Wheels of Soul,
Read more: http://www.businessinsider.com/dangerous-american-gangs-fbi-2011-11?op=1#ixzz2PY6ufiP0
Under the first amendment they have the right to exist, as long as they are not breaking any laws.
They are equal to the Boy Scouts if they are not breaking any laws.
They have the right to organize and to protest, as long as they don't break the laws.
That being said:
All these gang members should be arrested under the RICO act and thrown in jail for life; but, that won't happen yet.
Right now I do not believe there is enough of them, or a strong enough group of them to become a serious threat to the US. However, I do believe it is good to stop and handle things before they get out of control. It would be terrible if people in our country have to worry about going outside.