Not really, most Republicans now realize we should have stayed out of WWII in Europe. Hitler would have crushed the USSR and hundreds of millions of lives would have been saved.
After the war, the British Empire (under either the British or the Axis depending on how that fight went) may well have been turned against you directly as a way to recoup losses, and regardless of which of Axis or USSR (or the British) won, someone would have gotten the magnetron and the rockets and the nuclear explosives, and it wouldn't have been the USA.