Why Black Adam killed the Council of Eternity ? The answer isn't clear from DC or Geoff Johns. But I have some theories :
He saw the council made critical error by giving his nephew powers. He was against giving children powers because they aren't mature enough to endure the harsh reality of this world
Has Black Adam's political role been avoided since Geoff Johns' departure? The short answer is yes. However, Johns was the author who turned him into a global geopolitical force.
Geoff Johns made Adam hate the American imperialism. They controlled Kahndaq before through a puppet called Ibac II. So his quest against them when he was in the front of White house was retaliation to what they did to his country of Kahndaq.
Still my favourite page from Adam's origin in Kahndaq and it begs the question: Does the end justify the means? I think people misunderstood Black Adam from his actions here
And I think Geoff Johns is genius here he made Adam have questions:
1) Why the Wizard chose a child to do a man's Job?
2) What if we try to redeem the invaders and fail? What will happen to us?
3) What if our shared powers can't work against the barbarians?
The sword Adam used called 'Zulfiqar'. And historically it was given to Ali ibn Abi Talib by Prophet Mohammed. I like the reference from Saladin Ahmed here
