Wow, that is a pretty cherry picked definition of a racist, lets see what others think:
Dictionary.com Unabridged (v 1.1) - Cite This Source - Share This
rac·ism Audio Help /ˈreɪsɪzəm/ Pronunciation Key - Show Spelled Pronunciation[rey-siz-uhm] Pronunciation Key - Show IPA Pronunciation
–noun 1. a belief or doctrine that inherent differences among the various human races determine cultural or individual achievement, usually involving the idea that one's own race is superior and has the right to rule others.
2. a policy, system of government, etc., based upon or fostering such a doctrine; discrimination.
3. hatred or intolerance of another race or other races.
--------------------------------------------------------------------------------
[Origin: 1865–70; < F racisme. See race2, -ism]
—Related forms
racist, noun, adjective
Dictionary.com Unabridged (v 1.1)
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2006.
American Heritage Dictionary - Cite This Source - Share This rac·ism Audio Help (rā'sĭz'əm) Pronunciation Key
n.
The belief that race accounts for differences in human character or ability and that a particular race is superior to others.
Discrimination or prejudice based on race.
rac'ist adj. & n.
(Download Now or Buy the Book) The American Heritage® Dictionary of the English Language, Fourth Edition
Copyright © 2006 by Houghton Mifflin Company.
Published by Houghton Mifflin Company. All rights reserved.
Online Etymology Dictionary - Cite This Source - Share This
racist
1932 as a noun, 1938 as an adjective, from race (n.2); racism is first attested 1936 (from Fr. racisme, 1935), originally in the context of Nazi theories. But they replaced earlier words, racialism (1907) and racialist (1917), both often used at first in a British or South African context.
Online Etymology Dictionary, © 2001 Douglas Harper
WordNet - Cite This Source - Share This racist
adjective
1. based on racial intolerance; "racist remarks"
2. discriminatory especially on the basis of race or religion
noun
1. a person with a prejudiced belief that one race is superior to others
_________________________
If your tagline references disclaimers regarding the nature of political posts, then you should just hit notify.