What you’re saying is that demons are stronger than God.
"Then Jesus called the people to him. His followers were also there. Then Jesus said, “If any person wants to follow me, he must say ‘No’ to the things he wants. That person must accept the cross (suffering) that is given to him, and he must follow me.” Mark 8:34, Matthew 16:24
Wrong. You could say that from witnessing the crucifixion as a mistaken person.
What I am saying is that God permits these things because of a certain natural law and freedom given to both men and demons, as well as for the sake of His justice and mysterious Will, just like with Job.
There have been great saints who have been -possessed-, and allowed to be attacked by the devil -in every way-, beaten, tempted almost beyond endurance, tortured, you name it.
Just like with human -people- who do these things to the Christian matyrs. Fallen angels are people too.
Were the devils stronger than God? No. God permitted it like he permitted it with Job, and with Himself as His example to us.
We are all to walk the way of the Cross, and these things that happen to us can all turn to our good if we submit to God’s will in them.
A state of grace is no assurance of lack of attack from the devil – What it does is make one more protected and resistant to sin, but a person in a state of grace actually -attracts- devils more than a person who -is in a state of damnation-. Why? Because the devils -do not care about the damned, they have WON-. They do care about the people in a state of grace, those are the soldiers they make war against.
God turns that war to the betterment and purification of the saints, by teaching them what the sins and flaws in them are that they have to overcome.
‘He began to teach them that the Son of Man must suffer greatly and be rejected by the elders, the chief priests, and the scribes, and be killed, and rise after three days. He spoke this openly. Then Peter took him aside and began to rebuke him. At this he turned around and, looking at his disciples, rebuked Peter and said, “Get behind me, Satan. You are thinking not as God does, but as human beings do.”’ Mark 8:31-33