>What did he take personally this time? You mean the question? As I said before, it was a long rambling question. Here's the lesson I see: as a reporter, you can wax lyrical in print or website or onscreen. But in a time-contrained Trump press conference, if you want to ask a question: you'd better be succinct. "Jews are being targeted across the nation with bomb threats. As POTUS, can you reassure not just Jews but all decent Americans and warn the evil-doers that we will not tolerate their behavior?" That would have been a softball for Trump. How hard is that?
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I am with you that it should be mainly Trumps prerogative to only answer questions fitting his personal style: If he wants them short/succinct/precise (be it that he has troubles following long-winded diatribates and/or wants the to limit the amount of unwanted interpretation of the question on the following days on dimensions he did not adress), but this is a slippery slope to banning topics, which is less ok in my book (unless specifically asked for with reasons given).

For me the balancing flip side of that is that the press SHOULD have a field day with "You look at what's happening in Germany, you look at what's happening last night in Sweden. " the same as with "alternative facts" or "Bowling Green massacre".