(CNN) - Long before he was a Republican candidate for Senate in Kentucky, Bowling Green opthamologist Rand Paul penned a letter to his local newspaper defending the rights of private businesses to discriminate based on race.
The 2002 letter, flagged Thursday by a liberal-leaning blog in Kentucky, was in response to a Bowling Green Daily News editorial supporting the Federal Fair Housing Act, a bill Paul said most would support "at first glance."
"Most citizens would agree that it is wrong to deny taxpayer-financed, 'public' housing to anyone based on the color of their skin or the number of children in the household," he wrote.
But as he did in controversial interviews Wednesday with NPR and MSNBC, Paul made a distinction between the rights of private and public entities when it comes to the application of federal law.
"Should it be prohibited for public, taxpayer-financed institutions such as schools to reject someone based on an individual's beliefs or attributes?," he asked in the letter. "Most certainly. Should it be prohibited for private entities such as a church, bed and breakfast or retirement neighborhood that doesn't want noisy children? Absolutely not.
"Decisions concerning private property and associations should in a free society be unhindered. As a consequence, some associations will discriminate," he continued.
Paul wrote that private groups like Alcoholics Anonymous and the Boy Scouts should be allowed to include or exclude whomever they choose.
"A free society will abide unofficial, private discrimination – even when that means allowing hate-filled groups to exclude people based on the color of their skin," he wrote.
"It is unenlightened and ill-informed to promote discrimination against individuals based on the color of their skin," he added. "It is likewise unwise to forget the distinction between public (taxpayer-financed) and private entities. A society that forgets this distinction will ultimately lose the freedoms that have evolved and historically been attached to private ownership."