I posted a reply day before yesterday but it never showed up, so I'll try to reproduce it. If the original post appears you can compare the versions.
There's no two ways about it, this is one weird comic. I've never seen a better example of the visceral appeal of comic book wish fulfillment. The whole issue is like the feverish revenge fantasy of a schoolboy beset by bullies. The bad guys are dropped into one ridiculous situation after another so they can be thrashed and humiliated by the heroes. You can almost feel the flailing fists and kicking feet as he cries, "Take this, you meanie!" But of course the comic was produced by adults and the world they were living in was far more complex than the blast-bedecked playland of Daredevil Battles Hitler.
I wish I were historian enough to place this book in context. It was likely produced around March-April 1941. Europe was engulfed in World War II. The US was sending arms and equipment to help the British but they weren't yet in the fight. Many other comic heroes were still fighting Hitler stand-ins ruling imaginary countries. It was still possible for public figures to suggest the US cut a deal with Hitler. Reading Daredevil Battles Hitler I get the feeling that Lev Gleason and company were frustrated with the status quo and wished the US would declare war and get on with it. So maybe it is a revenge fantasy, by grown-up schoolboys.
I wonder if Biro was also ahead of the curve in taking on the Japanese. It was my impression that comics didn't tear into the "Japs" until after the Pearl Harbor attack in December. All the racial stereotypes were already firmly in place, though.
I've never been able to figure out The Claw. I mean, come on, a giant fanged Fu Manchu? Someone was drunk when he came up with that one. I notice The Claw shares with most other giant comics characters the ability to change size depending upon the situation. He starts out as tall as a dozen men, then he's slightly taller then a dam, then he can stand on the ocean bottom and still poke his head and shoulders above the surface.
Both art and writing are pretty bad. I like how Cloud Curtis repairs his stuck carburetor while his engine is running. What's the deal with Goering, having landed next to a pig, deciding to shoot himself (but changing his mind)?
In conclusion I find this comic extremely interesting but I can't say I like it much.