I'm In North America, What The Hell Is The Demon System?

Zhao Qing brought a game "Dang Mo" with the background of Dang Mo Tianzun, and traveled to another world in North America, where Zhao Qing had the same name and surname.
As soon as the time traveled, the "Dang Mo" game department released a game mission:
[As a believer of Dang Mo Tianzun, you have been summoned by Tianzun and have entered Beiju Luzhou. Please teach the gang of greedy demons in front of you a lesson! 】
Zhao Qing looked around, something was wrong!
North America? Beiju Luzhou?
After receiving the mission rewards of "Zhenwu Demon Demonstration Visualization Picture" and "Exorcism Sutra", Zhao Qing suddenly realized that the world is vast and accepted this setting as a matter of course.
When faced with the task of "cutting down mountains and destroying temples" released by the game system again, he looked firmly at the church not far away, and shouted a shocking slogan: According to the order of the Demon God, cut down mountains and destroy temples, eliminate obscene worship, clean up chaos, and eliminate wild gods.
When vampires, werewolves, witches, demons, angels... became the big demon BOSS in Luzhou, Beiju, Zhao Qing went crazy killing them, but he was still just a demon captain, not even a heavenly general.
Until one day, he faced the biggest demon king BOSS in North America...Beijuluzhou: God, a sinister guy who didn't have much divine power left and could only hide behind his back and write diaries.
So, he began to want to be the Demon Lord, or God.