Demons do  Help People to Destroy Themselves 

" Satan is  trying  to and Destroying the Church from Within The church cannot be destroyed by an outside force. It will only be destroyed from within. Many times people think they are helping God as they accuse fathers and senior ministers of various crimes. 

They feel they are bringing to order the backslidden and deviant men of God. The accuser of the brethren urges them on and they are anointed from Hell to destroy the church. 
They generate much confusion and division within the church thinking they are doing the work of God.

 They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service. John 16:2 Now I beseech you, brethren, mark them which cause divisions and offenses contrary to the doctrine which ye have learned; and avoid them. 

Romans 16:17 Self-destruction is one of the key strategies of demonic attacks. 
When the spirit of Satan takes hold of a person, he will often begin to cut himself with stones. The prodigal son is a typical story of someone with a self-destructive spirit. He had everything going for him and he dwelt safely in his father's house. By one decision, he destroyed himself and his future. No external force contributed to his demise. It was all self-inflicted; he virtually cut himself with stones.