The Unholy Angels are Super Active

The Holy Ghost tells us in Ephesians 6 that fallen angels are numerous, vary in rank, and are actively bringing about the ruin of man, with special emphasis upon the church of the Lord Jesus. We see that an angel sent from God to comfort Daniel was actually held up 21 days by an evil entity. Why do many christians think that this is not going on all around us, and that we shouldn't be too concerned? The Bible says otherwise!