Many Christian believers are deceived. They have false security of salvation. Therefor they are self-assured, entitled and arrogant. They believe that they have a guarantee of salvation and that they cannot lose their salvation.
Most false teachings and doctrines are backed by Bible verses. People trust in Bible verses but they do not obey the words of Jesus, and therefor they will perish if they do not wake up and obey the TRUTH.
If you have come to know Jesus and you believe His teachings, you will know that there is no guarantee of salvation.
The reason why so many believers are deceived and doomed is because they believe lies. They do not believe and obey the TRUTH. The only words that lead to salvation are the teachings and commands of Jesus Christ, the TRUTH, as recorded in the gospels, Matthew, Mark, Luke and John.
Jesus Christ is the Way the Life and the TRUTH. Obey Jesus. Obey the truth. Repent and stop sinning. Be baptized in water as Jesus commanded. Obey His words, seek Him with all your heart, and He will reveal Himself to you. You will know the TRUTH and the truth will set you free.
May Jesus bless you.