uncle tom -–noun
a black man considered by other blacks to be subservient to or to curry favor with whites.
Random House Dictionary, © Random House, Inc. 2011.

Uncle Tom — n
A Black person whose behaviour towards White people is regarded as obsequious and servile
[C20: after the slave who is the main character of H.B. Stowe's novel Uncle Tom's Cabin (1852)]
Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © Harper Collins

And, considering his record, this is inappropriate or not applicable because of what, precisely???

Thomas called Anita Hill a lot worse.