During a time of war, it is inevitable and not necessarily inappropriate to limit some cultural interactions with an enemy nation, not least as part of a strategy of isolating an aggressor. If Russians cannot compete in international sporting events, should musical competitions be different? Is it any more unreasonable to want to postpone a performance of the bombastic and militaristic 1812 Overture than it was for the British conductor Mark Elder to express doubts about conducting the Last Night of the Proms following the outbreak of the 1991 Gulf War? (Elder was promptly replaced.)
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