So, to be more specific, you are concerned that the views expressed in the letter are shared by RP, even though there is no recorded instance of him ever authoring/speaking anything denigrating minorities over his thirty years of public service, all the while conducting himself in the public eye?
So, your implying that his 30 years of conduct was a flawless false front and he successfully hid his true feelings about minorities and blacks in his tens of thousands of speaking engagements on the record? That his voting for MLK Day as a national holiday was also a false front?
That we should not believe his public rebuttal (linked above), lack of any recorded evidence actually attributable to RP himself (his words, his mouth, his pen) notwithstanding?
That we should throw out the voice of the leader of Austin's NAACP Chapter in support of Paul (linked above)?
Well, I guess your free to believe what you want.