WW2 was bound to happen anyway. It wasn’t about a party, it was about everyone in Germany and Austria being extremely unhappy with the dictated treaties of Versailles and Saint-Germain. It only was a matter of time.
PS: Attacking France didn’t make much sense militarily (better to focus on other countries), but beating the French (who played a major role in the treaties of Versailles and Saint-Germain) was something that greatly motivated everyone to keep going.