Hitler was counting on Britain and France being more worried about the Soviets and thus, making a deal with Hitler to keep the Bolsheviks at bay.
One of the purposes of the Non-Aggression Pact from the German perspective was to encourage Soviet belligerence in Poland and the Baltics, to scare the Western Powers into making a deal with Germany.
i agree. hitler’s pattern was to make a deal with one guy, then down the road stab him in the back. at this point he is probably thinking that he can make a deal with france and UK, then attack russia.
also, the historical record is pretty clear, he never thought england would declare war on him over poland. his first major mis-judge, and the begining of the end for him.