Why not? The red hand is on the provincial flag of Ulster and on the badge of the Co. Tyrone Gaelic Athletic Association. It's non denominational. http://en.wikipedia.org/wiki/Red_Hand_of_Ulster
It's the same discussion as regarding swastikas and other symbols with shady meanings attached to them through history.
It's the same discussion as regarding swastikas and other symbols with shady meanings attached to them through history.