How sound is our mosque's imam's statement that God's actions are uncreated, and that no one influences God's actions with a causative effect, but rather with a causal effect? And do human beings influence God's actions, whether causally or not? And what is the doctrine of the Sunnis regarding God's actions?

The actions of Allah Almighty are not created; rather, they are His attributes. What is created is that which originates from these actions, which are His creations (maf’ulat). Al-Bukhari mentioned that the actions of the Lord, His attributes, and His speech are uncreated, whereas His creations are created. All actions of mankind originate from the will, creation, and decree of Allah Almighty, yet they are responsible for their actions due to their own will and volition.