The First ѕυιcιdє
Lucifer was the first being to commit ѕυιcιdє. When he was an angel of light, he knew he had life eternal during his Beautific Vision of God. Even the lowest minds of human creatures have an instinct for self-preservation, and it was that much more intelligence possessed by the angel Lucifer when he was in Heaven, but he wanted to be equal to God and not serve Him. He also knew of God's plan to make man in His image. Lucifer knew his attempt to be equal to God and no longer serve Him would send him to eternal death, but his pride still insisted on this impossible Heavenly paradign shift. It was an act similar to "ѕυιcιdє by cop". Due to Lucifer's revolt, God commanded St. Michael the Archangel to expel him from Heaven to eternal pits of death where he became Satan. Satan swore to bring death upon humanity, whom he hated. Satan seeks not only physical death of humanity, but death (damnation) of as many souls as possible. In the third chapter of Genesis, it's revealed to the faithful that Satan not only hates Our Lord and His Immaculate Mother, but he hates humanity, too, and he conspires to kill all of us and our souls.
This is actually profound. Fr. Ripperger (who I'm mixed on for a couple reasons) has said that satan essentially suffers from multiple personality disorder, due to his sins of pride and usurpation, of wanting to be God. As punishment, instead of being equal to the Holy Trinity, he himself fractured into three "personalities", so to speak, a diabolical mockery of each Person of the Trinity. Thus you have Satan (~God the Father), Lucifer (~God the Son), and Beelzebub (~God the Spirit), all actually being the same demon according to him.
But I'm cooled on Fr. Ripperger of late, agreeing with Fr. Isaac Mary Relyea that the former focuses too much on hell and demons for what is proper. Serving up salacious, sensational stories about demons only feeds the curiosity of the undisciplined.
A little knowledge of this is good and necessary (even the Blessed Mother describes the activities of demons in the "Mystical City of God"), but given our fallen nature and most people's intemperance regarding screens, I have to agree with Fr. Isaac.