First off, my argument was a case against envy. So WWII has nothing to do with it.
Second, didn't I get into the WII, Truman doctrine, Marshall plan and then the Cold War already? Read the whole topic.
Furtermore, it has nothing to do with my memory since I did not live during WWII.
USSR defeated Hitler. Allies freed west-Europe. Then the US build up west-Europe because of imperialism, to fight the USSR. Europe would be the nuclear battle field. If the cold war ever got hot, we would be the first pawn sacrificed. Most of the nukes would have fallen on Europe, those of both sides. And if it didn't come that far we would see massive tank wars, possible chemical or biological agents, massive artillary, many many soldiers. Not pretty. Furtermore, JFK risked a nuclear war. Thanks to his brother secretly removing missiles in Turkey and USSR backing off the Europe pawn didn't have to be sacrificed.
It accidentally turned out good for Europe. But do we thank the american government for that? No. We do thank the soldiers and the tax payers. But if you look at the troop numbers and casualty numbers of US soldiers in Europe, the number isn't that great. US had to fight Japan. Their major support was through their war industry. Another major effort was destroying every German city. UK at night, US during the day. These are all war crimes. Whole cities had been fire bombed. These attacks were worse than atomic bombs. Look at what happened with Dresden and Tokyo. I don't really want to thank them for that, even if it shortened the war.
Also, the US owns its existence to countries like Netherlands, France, etc helping them against the British. Yes, they did this for their own gain. But that is how things work. I still remember footage of americans pouring French wine into the sewers because France wouldn't allow the insane invasion of Iraq. Poor deluded individuals. But I still eat Ben's & Jerry's ice every now and then. I have no problem with that.
Actually, since my country is one of the most loyal US allies the WWII argument is made quite often. But it is a total fallacy. You just don't support someone unconditionally because of something that happened in the past.