The rights and wrongs of the recent troubles in Ireland are a matter of opinion and, for me, boil down to (a) whether it is right or wrong for one country to rule another - be it 6 or 32 counties, and (b) If it is wrong, to what lengths it is acceptable to go to right that wrong.
It seems to me that both sides were prepared to go to unacceptable lengths to either maintain or change the situation, and to quote Harrods and Mountbatten, while ignoring the Dublin bombings and Bloody Sunday is a clear sign of support of one set of atrocities over another. I assume you would not oppose the singing of 'God save the Queen' on the basis that it gives comfort to one of those sides - or would you?
Throughout history, ballads and songs have been made and used for or against one or another cause; as early as opposition to a Catholic Monarchy with Lillibulero, or the seventeenth century Jacobite campaign with The Haughs of Cromdale. In 1704, Andrew Fletcher of Saltoun wrote 'If a man were permitted to make all the ballads, he need not care who should make that laws of a nation' - things haven't changed that much.
Jim Carroll