D Day happened not because of some altrustic desire to liberate France but because the remaining capitalist states saw that Germany was neither salvageable nor willing to work with them, and something need to be done to stop the Soviets from liberating all of continental Europe and building a socialist bloc with abundant year round naval ports in the open Atlantic

you want to know why America fought in Europe in WW2? it wasn’t selflessness, it was fear of communism