When nobody takes your campaign seriously, nobody does background research. When Paul called out Rudi he inadvertently brought on a bit of scrutiny he might not have wanted.
From the Houston Chronicle:
Texas congressional candidate Ron Paul's 1992 political newsletter highlighted portrayals of blacks as inclined toward crime and lacking sense about top political issues.One would think that being on record expressing views like this would be a liability but then you remember he's running as a Republican. Being a racist will probably get you a sizable portion of the Republican vote.
Under the headline of "Terrorist Update," for instance, Paul reported on gang crime in Los Angeles and commented, "If you have ever been robbed by a black teen-aged male, you know how unbelievably fleet-footed they can be."
"Opinion polls consistently show that only about 5 percent of blacks have sensible political opinions, i.e. support the free market, individual liberty and the end of welfare and affirmative action,"Paul wrote.
"Given the inefficiencies of what D.C. laughingly calls the `criminal justice system,' I think we can safely assume that 95 percent of the black males in that city are semi-criminal or entirely criminal," Paul said.
Paul also wrote that although "we are constantly told that it is evil to be afraid of black men, it is hardly irrational. Black men commit murders, rapes, robberies, muggings and burglaries all out of proportion to their numbers."
Ron Paul Republican 2008 Election Racism