Yes, noone wanted war; everyone just seen different ways of preventing it.
West preferred concessions and having Hitler look East; USSR preferred anti-Hitler pact but had to settle for Non-aggression Pact.
He thought Hitler to be smarter then he actually was.
Because they could easily see West
siding with Hitler without formal alliance.
They already did with Czechoslovakia, after all.
And, remember, part where France and Britain were obligated to declare war when Poland would be attacked was
secret - even Hitler was surprised.