What did Germany fear after WWI and how did they respond?

They basically hated everything and blamed the Jews for everything that was wrong with the world. With Hitler in power, basically he encouraged Germany and started almost what seemed like a riot to take back what was theirs since the treaty of versailles made them pay a whole bunch of money and give up some land. They were angry since the war was blamed on them in the first place, so their response? Start WWII with trying to erase all the Jews from the Earth.