TItus 3:4 But when the kindness and love of God our Savior appeared, He saved us not because of righteous things we had done, but because of His mercy. He saved us through the washing of rebirth and renewal by the Holy Spirit, whom He poured out on us generously through Jesus Christ our Savior, so that having been justified by His grace, we might become heirs having the hope of eternal life.
In reply Jesus declared, "I tell you the truth, no one can see tha kingdom of God unless he is born again." John 3:3
1 John 4:9,10 This is how God showed His love among us: He sent His one and only Son into the world that we might live through Him. This is love: not that we loved God, but that He loved us and sent His son as an atoning sacrifice for our sins.
Romans 10:9 if you acknowledge publicly with your mouth that Yeshua is Lord and trust in your heart that God raised Him from the dead, you will be delivered.
There are a lot of lies and deceptions all over the place about what Christianity is, who Jesus and God are, etc. To know the truth one has to trust in the Lord, trust in His word. He will show the way.