Otherwise they are doomed !

“Thus the material world is becoming more and more godless, and consequently everything is in a disturbed condition. If this continues, the Supreme Personality of Godhead will certainly take action, as He did in the case of Hiranyakasipu. Within a second, Hiranyakasipu and his followers were destroyed, and similarly if this godless civilization continues, it will be destroyed in a second, simply by the movement of one finger by the Supreme Personality of Godhead. The demons should therefore be very careful and curtail their godless civilization. They should take advantage of the Krishna Consciousness movement and become faithful to the Supreme Personality of Godhead; otherwise they are doomed. As Hiranyakasipu was killed in a second, the godless civilization can be destroyed at any moment.”

His Divine Grace A.C. Bhaktivedanta Swami Prabhupada.

SB 7.8.31 – Purport