That is almost as bad as the family secret about my grandfather from County Cork having had IRA ties. My Dublin born grandmother admitted it only after he was dead and she was well into her eighties. Even then, looking carefully around her room in the nursing home, my grandmother whispered the long suspected secret and warned that it was not to be spoken of outside the family.
There are wonderful old songs about the IRA years ago. You can find them google.
Check out the Boys of Kilmichael.
https://www.youtube.com/watch?v=T6QX2paFZxc
This year is the 100th anniversary of the Easter Uprising. God bless those men.