It is almost impossible for a nation or people to forgive and forget that some of their soldiers who took an oath would desert to fight along side an ancient enemy. The fact that that enemy was fighting an even more evil nation and ideology is essentially immaterial to those who were betrayed.
That’s how real life works. We would be no different most likely.
In his speech celebrating the Allied victory in Europe (May 1945) Winston Churchill remarked that he had demonstrated restraint in not laying
‘a heavy hand upon Ireland, though at times it would have been quite easy and quite natural.’
Britain had occupied neutral Iceland in May 1940. In a response a few days later, de Valera acknowledged that Churchill did not add ‘another horrid chapter to the already bloodstained record’ of Anglo-Irish relations, but asked:[40][41]
“ ...could he not find in his heart the generosity to acknowledge that there is a small nation that stood alone, not for one year or two, but for several hundred years against aggression...a small nation that could never be got to accept defeat and has never surrendered her soul? ”