If Nazi Germany had committed its resources to eliminating Semites across Europe covertly, rather than overtly, they would have become unstoppable simply because they could have covered the Western world with autonomous cells that Jewish occupied Western governments would be incapable of tracking down entirely.

The Nazis shouldn't have arrested the partisans and Jews, they should have poisoned them and watched them fall across the country while playing dumb or blaming it on a pandemic.

If they had decentralized and made a way for these groups to be self funded and completely autonomous, even if Germany had lost the war, they still would have won western states back for Western people.

Covert warfare is a thousand times better than overt warfare because the war can be over before your enemy even knows what's going on, every day they don't know what's going on cripples their ability to fight and overt war, and it makes it impossible for foreign groups to take up residence among your people since even if they take over the institutions by force the population itself will eliminate them and they will not know where it comes from.

Imagine if Germany had done this instead and a Jew could not so much as buy food from a supermarket without running the risk of death. They would not be able to continue their form of colonialism by infiltration.