Challenge is so far off as to not be worthy of response, but...
Krusty, that's just plain stupid.
Even P-47s taking hundreds of machine gun rounds and 10+ 20mm rounds were extreme rarities. No aircraft, fighter or bomber, could reliably take that kind of beating.
Also, mountings on single engine fighter were specifically geared towards hunting bombers. The 190 in particular is a good example. Notice the 109 doesn't get the 30mm till late in the game, when bombers become a big threat.
Consider that all designated night fighters and bomber killers had the 30mm.
Wrong, wrong, and wrong, on all 3 points.
First off, P-47s WERE repeatedly taking astounding amounts of damage, even blowing piston heads out of the engine, and still making it back to base. P-38s were rather rugged as well, and with the engine redundancy were able to make it home with 1 dead engine (someing most other fighters could not). Further, all the way from the first time the US planes encountered German planes, in the deserts of Africa, the P-40s were quite sturdy as well. They soaked up quite a lot of ammo. The few super-experten aces were able to land hits where they counted, but for the average german pilot, US planes were frustratingly tough to take down.
To follow along with this point, as early as 1942 Operation Barbarrosa began on the Soviet front. Here the super-rugged construction of Soviet aircraft began to be a major problem. Fighters weren't so resilient as were the bombers and attackers, which were armored. The IL-2s were literally armored bathtubs around the engine and crew compartment. Repeatedly IL-2s could soak up multiple attacks from German fighters and the Germans would break off after expending all ammo. Fw190s had a better time of it, but they still soaked up 20mm. If you look at the push and development of the 30mm Mk108 you will find it coincides with the increasing toughness of the single engine aircraft, NOT the skies-full-of-heavy-bombers, which weren't a problem at the time.
And the final issue for this increasing target toughness was the massive loss of the skilled aces and experts to train new pilots. Their schools weren't the same as US schools. Their green pilots passed the basic training and were sent to a new unit. The existing experts at that unit would then lead and train them in combat encounters, often the green pilots hanging back and watching as the expert flight leader engages a target or two. The problem is: What if there's no expert to lead them? They're basically cannon fodder. IF they saddle up on a target, their gunnery may only allow them to land a hit or two on target, and while they spend all their time fighting to finish a target off, others may come in behind them to shoot them down. The 30mm round was intended to allow finishing of fighters in as few rounds as possible so that those green pilots COULD land a hit or two and then pull off and look for the next target. No time wasted pursuing the target, getting fixated, and being shot down from behind. It was as much for the survival of their pilot force as it was for anything else. These aspects of combat were all known and appreciated by members of the Luftwaffe.
Your second point is utter nonsense! All mountings on single engine planes were for bombers? Uh... hum... Well I hate to break it to you, but the majority of single engine planes used their 30mm against other single engine planes. Or against twins. You could have a squadron with 1 gruppe of Fw190s heavily loaded to attack bombers, and the rest of the gruppe as escorts and fighter sweeps and ground attack, all of which could have the 30mm. The claim that any plane with 30mm was automatically intended to hunt bombers is disproven by all of my comments disproving your first point (and oh so many more).
The third point is quite wrong as well. In fact, 30mm was a rather BAD choice for night fighters. Most night fighters that used schrage muzik installations relied on MG/FFm upward firing 20mm cannons. Especially on planes like the 110G that would also attack with forward guns, the 30mm were often omitted entirely due to the blinding flash they caused -- it destroyed the pilot's ability to fly after his eyes adapted to the dark. Many flew with the under-side 20mms on 110Gs only, because the nose itself hit the flash and protected the pilot's night vision. For a good part of the night fighter forces, 30mm was NOT used. Some lesser-produced planes flew with 30mm, the He219 (though precious few of those ever saw combat) had the guns mounted well behind the pilot to prevent this blinding flash, but mostly the 110Gs and Ju88s were the main brunt of the night fighter force, and they ALL relied (almost entirely) on 20mm ammunition.
P.S. The Mk108 development was long and labored. There were many problems to overcome, though not as bad as some other guns in development. In early-to-mid 1944 they were ironed out and being pushed into EVERY airframe the Germans had in combat. It wasn't singled out for any sub-set of "bomber hunter" aircraft. It was put into every 109G variant and into every Fw190 D variant (though due to problems with the 190D development timetables most of these were scrapped in favor of ta152s which never showed up in time, which also had 30mm but weren't specifically bomber hunters).
A good example is the Fw190D series. It was lightened from the 190A8s and had less armaments to improve performance as a FIGHTER, against US fighters. And yet, still, it was being given hub-mounted mk108s and 2x 20mm in the wing roots in the next 190D variants (D-11s, D-12s, D-13s). These were not bomber hunter airframes. These were to be THE next variants of the Fw190 until the big Ta152 came along. They stopped the 190 line but the 152 suffered too many setbacks to fill the void. It would have filled this void with the same armament: a hub 30mm and a pair of 20mms. It was a direct replacement for a FIGHTER airframe, carrying the same weaponry as the FIGHTER it replaced.
