That could very well be true. Still learning my way around this little microcosm of the Innertoobz, and its denizens.
Here is a question for you. I retired almost eight years ago. At the time I was working for a very large health care entity as a utilization review nurse. My next-over-cube person was a RW-radio-listening super "patriot" conservative who absolutely hated Obama. Will call her T. here. Because we shared our work space with a variety of people who were of different races, at least 30% non-white, she tried hard to couch her hate of Obama in political terms. Like me, she is a white person. When a coworker who happened to be a person of color would enter her cube to ask her a question about the work stuff, T. would speak pleasantly, slowly, and kindly as though a child had come in to ask her what color crayon to use next. Even worse, if the person stayed longer than a couple of minutes, T.'s language would shift to mimicking "Ebonics". "Oh girrrrl, you don't need to deal with that hot mess, let me do it" and so on. Would you think this person was racist, even though rather benign?
BTW, during the 2008 campaign someone put up some cartoons in the cafeteria depicting Obama as a witch doctor and as a Muslim. Everyone believed that T. did it. I don't know because she really is a nice person, but I can see why she was a suspect.... especially given her very outspoken political viewpoint.