'Explain, briefly, why some people are prejudiced against Jews' - this was an exam question on a GCSE religious studies paper, and some people, including Education Secretary Michael Gove, have taken exception to it. There's been a discussion about this on Facebook in which, roughly, one view of the matter is that the question is offensive because it is inviting students to think there might be good reasons, and ones for which Jews themselves are responsible, why Jews are not liked; and the other view is that the question asks for no more than the likely sociological causes of scapegoating, racism etc.
I can see something on both sides of the issue, but if one takes the question strictly as phrased, then I think the second of the two views summarized above has more to be said for it. Read quickly and by someone without much experience in analysing subtleties of meaning, the question could indeed suggest that candidates are being asked in a general way why Jews might incur dislike or hatred; being asked whether there are any acceptable reasons for this. However, once you note that the explanation being sought concerns prejudice, that interpretation is ruled out. According to my New Shorter Oxford, prejudice in its relevant meaning is 'Preconceived opinion not based on actual experience; bias, partiality... an unreasoning preference or objection...' Anyone who sees this should be able to see that they're not being asked for explanations that could justify anti-Semitism but, rather, for an attempt to explain unjustified belief.
One can wonder, all the same, whether the exam question was a prudent choice, or whether it didn't expect too much from students at GCSE level, many of whom may have little or no philosophical or linguistic training.