Have you actually had any contact with dwarves yet?
Have you refrained from making little jokes, short gags, small plays on words, tiny jives?
Or commenting on the eating habbits or the flamboyant look and style of every elf?
Or told an ork to his face that he is ugly?
Or tried to get a troll to understand that you called him stupid?
And by doing any of those proven, again, that racism is a sbcategory of dumb?
Especially in the World of Shadowrun.