Do not go to a bar and order an "Irish car bomb." Seriously. Just don't. You are ordering a drink that is related to a conflict that is not terribly far removed from now.
Also, I DARE you to to go Ireland and order an Irish car bomb. See how it's received.
Someone who will always find the Fighting Irish an offensive mascot because it is offensive to Irish domestic violence victims, but not on par with any mascots that demean Native Americans, at least not here.