I still highly recommend the lens of perspective (it would be even better if public figures tried this before opening their mouths, but hey).
According to PrejudiceChooser (TM), for a random prejudice, the article reads:
"The government should consider allowing the police to confiscate the belongings of black men not carrying identification documents, Lord Sugar suggested yesterday. The star of BBC show The Apprentice agreed it was impractical to license black men, but pointed to the example of the United States.
His comments came as peers called on the government at question time in the House of Lords to take a firmer stance on black men who break the law. "
Naturally, I'm sure nobody, least of all Lord Sugar would suggest such a thing as the passage above.
However, prejudice against different groups has a varying level of acceptability (not so long ago in the UK, it would have been just as unacceptable to say this about racial minorities but we were happily persecuting homosexuals, for instance).
That doesn't mean we can't recognize it for what it is - a "crackdown" on everybody identified by a common label that are not popular with the general public / media... a prejudice. IMO.