politically correct
In the report, I couldn't find a mention of why ILS 14 was closed. The vis was not good and aircraft were redirected to a non-precision approach (VOR/DME 28).
The reason is simple: it was late and the rich germans living on the Swiss border don't like overflying jets, even if they enjoy the facilities that Kloten offers. German authorities imposed a night ban overhead German territory: a contributing factor?