So, it appears that the Russian Hack of the DNC was triggered by these facts Papadopoulos uttered in may of 2016 to an Australian Diplomat

If I understand this right Papadopoulos spoke of this "BEFORE" the DNC Hack. So, he knew likely it was coming but might not have known how the Russians were going to get this information yet. So, the Russians hacked the DNC to give it to Trump and Papadopoulos specifically.