BOULDER, Colo., Feb. 10 - Prof. Ward L. Churchill has made a career at the University of Colorado out of pushing people's buttons, colleagues and students say, clearly relishing his stance as radical provocateur and in-your-face critic. Whether it is getting arrested by the Denver police for trying to disrupt Columbus Day, which Professor Churchill has described as a "celebration of genocide" because of the deaths of Indians that resulted from European colonization, or ruffling feathers in the faculty lounge, hyperbole and bombast have always been ready tools in the Churchill kit bag, people here say. Now many of the...