True. Hitler had legitimate gripes against the Versailles Treaty, but up until the invasion of Poland, nobody attacked Germany.
Almost as soon as he took power, Hitler began to arm-up in violation of the Treaty of Versailles. But that was not a warlike activity. And so he was left alone, as he probably should have been.
Then in 1936 Hitler ordered the remilitarization of the Rhineland. German troops entered what was supposed to be kind of a neutral zone militarily. That was also a violation of the Treaty of Versailles. But unlike with the first example, in my opinion this was a warlike activity, and should have been met with force. Pity that it wasn’t.
Ain’t 20-20 hindsight great?