Ya know, I was at a funeral mass where 'Parting Glass' was sung a few years back. It really didn't work for me. The kids had decided mum would love to have Irish music at the funeral, so hired the only musicians they could find on short notice. The performed the song very well and were good musicians. But people were mumbling about the song choice, because it was so out of character to who their mother was.

When the secular songs used in a formal funeral setting like a Catholic mass or Protestant memorial service aren't in character with the deceased, it can be quite jarring.