Actually I am of Irish descent and my people were hung more often than blacks!!
As a matter of fact as I understand it, the largest mass hanging was of 9 Irishmen in Boston!!
It was the end result of a total NINA policy!!
Are you speaking of legal hangings, or lynchings? IIRC, there was a mass hanging out west, where a heck of a lot more than 9 were hanged at the same time. I thought it was about 50, but I could be wrong - there's some photograph out there of the event. I'll have to see if I can find it... ;0)