As for most of the Jews being killed later in the war, that's partly because most of the victims were in territories the Germans had to conquer and stabilize first. And it's preposterous to assert that Hitler threw millions of his best troops and other resources into Russia just to intimidate the Brits. Buchanan has it backwards; going into Russia doomed any chance Hitler had of defeating Britain.
I have to wonder if Buchanan is partly motivated by the hatred of England which simmers within some Irish Catholics.
Poland was ‘stabilized’ before 1941
Perhaps, but from Pat's perspective you have to erase lend-lease, to Russia and the Brits, from the equation. Stalin might have been defeated without US support, and Hitler's belief that England could have been starved into submission could well have come to be.