Because mankind lives without God.

The whole tragedy of the Satanic enterprise is that by tearing the person away from God. Satan leads a "man without God" to such depths of moral decline, to which only "godless man" is able to dive. Satan wanted to prove to God and people, as atheists atheists try to prove it now, that it is quite possible to be a "high spirit" without religion and without God. But as a result of the Satan's plans, people's homes are filled with insane persons, prisons, hospitals and taverns, and people are divided into an endless number of groups, parties and coalitions. they are at war, fighting and killing each other. sin can grow and multiply, widen and deepen. And this we see in the improvement of the methods of waging wars that began with a fist fight, were conducted by a stone, a club, then an arrow, firearms, long-range cannons, and now - missiles capable of hitting any point of the globe.

The same growth of sin is noticeable in the character of the person himself. However, the eternal death of man is due not to the "gross" manifestation of sin. A person dies not because he became an "awful" sinner, but because he once sinned, forever became "unclean", desecrated, and therefore unfit for communion with God. In order to destroy a person, we only need to separate it from God, and this is achieved by any kind of sin: a sinful or, humanly, attractive.

It is superfluous to add that Satan's main goal is to "kill and destroy" and that he achieves this goal not only with "barbarous", but also with the most refined, "scientific" ways.