Are you saying that Christ did not die for our sins?
Or are you saying that Christ is not God?
Moreover, brethren, I declare unto you the gospel which I preached unto you, which also ye have received, and wherein ye stand; By which also ye are saved, if ye keep in memory what I preached unto you, unless ye have believed in vain. For I delivered unto you first of all that which I also received, how that Christ died for our sins according to the scriptures; And that he was buried, and that he rose again the third day according to the scriptures: (1 Corinthians 15:1-4 KJV)
Are you saying God died?
Your question on the topic was whether men have the power to kill God.
My answer was Did God die? or i.e., no. I don’t think you are saying the answer is yes here.
If you wish to get into Christology or the Hypostatic Union or the Doctrine of the Holy Trinity, that would be off on another topic.