Allah Almighty will not show mercy on those who never show mercy on others
There are 112 Noble Verses that contain "Most Merciful" in them in the Noble Quran
Notice that Allah Almighty in the Noble Quran is the Most Merciful and not just Merciful. This should be another crystal clear proof that Allah Almighty's Mercy is far beyond us and our understanding, and it is certainly infinitely stronger than all of the evil humans do or cause here on earth.
(The Noble Quran 34:22 )
Say: "Call upon other (gods) whom ye fancy, besides Allah: They have no power,- not the weight of an atom,- in the heavens or on earth: No (sort of) share have they therein, nor is any of them a helper to Allah.
35:6
Verily Satan is an enemy to you: so treat him as an enemy. He only invites his adherents, that they may become Companions of the Blazing Fire.