Fear not, its overuse has caused the word to be meaningless. Numerous whiteys (of which I am one) that I know here in Atlanta just laugh like crazy when someone mentions racism to them. The word has no shock meaning anymore. The race warlords are going to have to come up with something else.
Regarding the shooting of the illegal border crosser:
The border guard was DOING HIS JOB. This person was invading the United States of America and paid the price -- the eternal celestial dirtnap.