Paul published a newsletter in the 80s and 90s with some very racist stuff. He's tried various forms of denial about them since 1996, when he ran for Congress after his hiatus. First he claimed he was quoted out of context. Next was that he hired an editor who wrote these under his name when he wasn't aware of it. Lately he claims he didn't even know who wrote the stuff.
He never explained how he once knew who wrote the stuff, then later didn't know. He never explained how for decades a newsletter bearing his name printed racist crap and implied it was him and he never tried to stop it. The writer claimed he was from Lake Jackson (a small town where Ron Paul lives), implied he was Ron Paul, regularly distributed this newsletter in ways that would have been easy to track. No one ever said "Hey, former Representative Ron Paul, do you know there's some racist stuff being printed under your name?" That's impossible to believe.
Further, I lived in Ron Paul's district when he ran for his second stint in Congress. I saw the types of commercials he ran. He attacked liberals for being liberals, in what was supposed to be a humorous way (and which mimicked the attempt at humor in his racist rants in the newsletter). One of his opponents was named Loy Sneary, and Paul's entire campaign was a series of people saying "I'm leary of Loy Sneary," with several people asking "What kind of name is Sneary, anyway?" As in, what nationality or ethnic background is Sneary.
Ron either wrote those articles or knows who did, and he either approved them or refused to stop them.
Some quotes: "The criminals who terrorize our cities -- in riots and on every non-riot day -- are not exclusively young black males, but they largely are. As children, they are trained to hate whites, to believe that white oppression is responsible for all black ills, to 'fight the power,' to steal and loot as much money from the white enemy as possible."
"Carjacking" is the "hip-hop thing to do among the urban youth who play unsuspecting whites like pianos."
“opinion polls consistently show only about 5% of blacks have sensible political opinions,”
“if you have ever been robbed by a black teen-aged male, you know how unbelievably fleet-footed they can be,”
Barbara Jordan is “the archetypical half-educated victimologist” whose “race and sex protect her from criticism.”
“Order was only restored in L.A. when it came time for the blacks to pick up their welfare checks three days after rioting began."
"In January 1995, three months before right-wing militants bombed the Murrah Federal Building in Oklahoma City, a newsletter listed “Ten Militia Commandments,” describing “the 1,500 local militias now training to defend liberty” as “one of the most encouraging developments in America.” It warned militia members that they were “possibly under BATF
or other totalitarian federal surveillance” and printed bits of advice from the Sons of Liberty, an anti-government militia based in Alabama--among them, “You can’t kill a Hydra by cutting off its head,” “Keep the group size down,” “Keep quiet and you’re harder to find,” “Leave no clues,” “Avoid the phone as much as possible,” and “Don’t fire unless fired upon, but if they mean to have a war, let it begin here.”" (Complete excerpt from the link below)
Here's a link with some of these quotes, and a more thorough analysis of the people Paul has surrounded himself with or hired, the names the newsletters were printed under, and other views expressed in them, as well as the events and groups Paul has chosen to attend or support.
http://www.tnr.com/article/politics/angry-white-man?page=0,0&id=e2f15397-a3c7-4720-ac15-4532a7da84ca
He's either a right wing racist who believes in southern secession and the anti-American militia movement, or he is an exceptionally poor judge of character in his employees and associates with no strength to oppose them.