Twenty One Pilots performance insensitive: do you agree?

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Seen this little gem of a tweet

A little background: Ireland had a few issues a few years ago known as the Troubles, if you’re not clued in then the IRA wasn’t happy with the way things were being run and so in order to try to please themselves they, a terrorist organisation, took up bombing and other horrible crimes

So, should 21P altered their act in a city/country where this could be perceived as a sensitive issue, or are people overreacting to something that is completely unrelated?