I am sorry if I hurt your feelings but
you started with this:
Rudel did not shot down a single enemy plane during his wartime service
What is your proof of that.... what is your justification...?
Off course the Stuka JU-87G wasnt a fighter plane, it was slow, poor rate of climb and the gunner cover a small aerea in the rear. But still is posible to destroy an enemy aircraft ( by the way a Ju-87B was the first plane in achieve an air-to-air kill in the WW2 but off course you dont know nothing about it
)
The Gustav was equipped with the Borkanone 3,7 with tugsten core ammo, the ammo had a weight of 410 grams and an initial speed of
1170 meters per second with a ciclic rate of 160 per minute.
Although the Ju-87G cannot pursuit any aircraft if someone had the bad luck of fell in the crosshairs of the Revi gunsight ,is very likely that this ammunition ( designed to fight tanks) not only shoot down a IL-2 but chop it to pieces, tore apart, blasted it completely.
That is concerning the Ju-87G , but ...what about the 405 missions wich he flew in Fw-190s, this misions had always contact with the enemy and many times with enemy aircraft. even if the mission of Rudel was attack the vehicles and artillery positions he also managed to engage the russian fighters an attack aircraft and destroy some of them.
Is a logical thing to happen if we consided that he had acomplished more than 2000 missions when he start to flew with the Wurger, and he had accumulate an enormous figthing experience.
But still you say:
Rudel did not shot down a single enemy plane during his wartime service
You say that sitting in your chair , thousands of kilometres away and doing no research whatsoever.....sorry buddy but THIS is crap, real crap, I mean a lot of crap ...you are the Crap Kommodore