If that poster was smart, and I don't believe he is, he would have recognized the incredible *ss-smacking you gave him.
My family is like Grellis'; we didn't get here until the late 1800's. Plus we are illegal since we snuck in from Canada after stowing away on a ship from France.
My husband's family on the other hand has been here since before the Revolution. So I guess the kids count as "real" Americans.
Criminey jimjams! Is your family from San Fratella? Cattolica?