That is what the devil wants you to believe when he deceives mankind. He wants you to think that demonic activities are real, but not mentioning God, not to bring the Christian religion into discussion. And by that, only believing the devil exists but not Christ/God, or have a wrong perception of who Christ/God is, and mankind does not have power to overcome the devil by themselves. The devil's goal is to make people don't believe what Jesus really is, but think he is something else, hence the unbelieving men have no faith and cannot be saved.
However, Christ is the Truth and Light of the world, and the demons fear him. And the devil wants himself and his deeds to be manifest among unbelieving men, but hiding from them the truth of the Lord Almighty who is far more powerful than him, so that they don't know and be saved by Christ.
Many of these demonic activities are not part of the ecosystem.