So named because if it wasn't for them we'd all be speaking German or Japanese right now. Or, depending upon your ethnic status, exterminated, or used for bayonet practice.
My dad (who personally is as conservative as they come, though with fond memories of FDR) is of the tail end of this generation--he enlisted just in time to go to Okinawa. He always tells me people living today don't fully understand what WWII was really like. It wasn't like Vietnam or Iraq where everyone at home carries on as normal while the troops are on the front lines--everyone was in the war effort, whether it's boys too young to enlist working in shipyards churning out a ship every day or two, or old men in Bend, Oregon meeting at the bar and planning how to defend the town in case the Japanese landed, to the rationing. And that's America--not Britain where they had bombs and rockets raining on their heads, and where the success or failure of the RAF could dictate whether your family survived the night. Total war means the entire population is involved, and WWII was the last total war the English speaking world ever fought. Keeping all of that in mind, I'm willing to forgive a lot from the WWII generation.