Russian Hitler Isekai "Comrade Hitler"

Notes:

In Comrade Führer, and Comrade Hitler -- both books showing Adolf Hitler partly in Russian airborne uniform attacking London and burning Western tanks -- a Russian author fantasy about a cordial alliance between Stalin and Hitler. A modern Russian wakes up in the mind of Adolf Hitler, becomes an ally of Joseph Stalin, and helps the Soviets to defeat British Empire and the US. Having executed Winston Churchill “for war crimes”, he helps develop a Soviet nuclear device, and orders the Wehrmacht “to fight together with the Red Army.”