I suppose visiting a grave yard is might be a way of claiming the high moral ground in a debate. Perhaps, it is the mass graves in Iraq that Saddam's regime filled with his victims that would be the more appropriate venue to use for such a basis to an argument.
I do love the IRA funding argument, and it does have some validity, however to think the IRA got a support from the vast majority of the American population is a real stretch. I will bet you 999 of a 1000 Americans do not even know the difference between Ireland and Northern Ireland much less why the fuss that went on.
I will also bet those same folks could not find the place on any map of the world. Remember, we are the folks who do not have passports or speak anything but American English.