Here's the breakdown on more recent conflicts:
WWII, 625 total recipients, 13 Irish, 2.1%.
In the Korean War, there were 152 Medal of Honors, 3 given to Irish, or 1.9%.
In the Vietnam War, there were 271 Medal of Honors, 13 given to Irish, or 4.8%.
There were 36 Medal of Honor medals given out in the wars in Iraq and Afganistan. Of these, 3 are marked as Irish on that page, or 10.7%.
The rest of the article seems to misunderstand FMEA style "write down every conceivable bad scenario in the universe, how bad it is, and then what you have done to stop it", and then spins this as "look at all these horrible known issues they knew about". I hope a jury doesn't view it the same way, because it would be an epic bad for safety everywhere if engineers writing down a list of bad things to avoid and mitigate was forbidden by company lawyers.