"Consider this for ingratitude...FDR could not get Americans rallied to fight Hitler, when Britain and France were already engaged against Hitler in 1939"

Is that similar to your help in the Pacific, or the crew of the HMCS Uganda deciding to leave a theater of war? The "Volunteers Only" policy to help the U.S. and Australia win in the Pacific is also a crowd favorite.  

Ingratitude - you bet..