He was the one who organized the lettuce boycott. Remember that?
Unlike Lincoln, Chavez also did not bring about or attempt to bring about the death of 600,000 Union folks and Confederates in order to force the latter to remain in the Union in violation of Amendment X of the Constitution. Why choose between them? you can have them both. We also have Martin Luther King Day. We might also want to honor Robert E. Lee, Stonewall Jackson, Jefferson davis, et al. Diversity need not be all left.