> It tells me that "some" people are ignorant and racists
Half of people are below average intelligence.
*shakes head* Median. Half of people are below median intelligence.
*shakes head a bit more* Average. Half of the people are below average intelligence. Due to the law of large numbers and the construction that intelligence has finite variance, intelligence is normally distributed. Therefore the statement holds for the three most used averages: Mode, Median and (arithmetic) Mean.
Given how many people are at average intelligence, 'less than average' is less than half, and 'less than or equal to average' is more than half.