the fuk? are you brehs smoking crack, there was no western front until the US stepped in, england was thoroughly defeated military wise and it had essentially zero offensive capability, churchill was mostly bluffing with his tough talk and only water allowed england to survive long enough until the US stepped in
of course once it became a two front war hitler had little chance, that is why it is historically correct to say that american capitalism and american industrial might defeated hitler
there are scenarios under which russia and england could have held off for a longer time because in war the defender usually has the advantage, so maybe russia and england would have kept some type of territorial integrity, but there isnt any american-less scenario under which either of them could have fought back to berlin to defeat hitler, so scandanavian countries would have remained under hitler without the US opening up the western front (except maybe finland)
and lets not forget the us was also fighting on two fronts and it defeated both enemies on both fronts