Not so. Paul wrote to Christians:
“For by grace you have been saved through faith, and that not of yourselves; [it is] the gift of God,” (Eph 2:8 NKJV)
God saves believers in Christ. If you do not believe, unbelief, you will not inherit God's promises. Just like it says, they could not enter into the land because of unbelief.
People cannot enter into the kingdom if they do not believe. Unbelief does not please God, unbelief brings anger then wrath.
And the resurrection to come is of the wicked and good, both are resurrected at the same time, but they have different destinies.
Salvation is both now and later on. Couple examples
John 5
24
“Most assuredly, I say to you, he who hears My word and believes in Him who sent Me has everlasting life, and shall not come into judgment, but has passed from death into life. 25 Most assuredly, I say to you, the hour is coming, and now is, when the dead will hear the voice of the Son of God; and those who hear will live. 26 For as the Father has life in Himself, so He has granted the Son to have life in Himself, 27 and has given Him authority to execute judgment also, because He is the Son of Man. 28 Do not marvel at this; for the hour is coming in which all who are in the graves will hear His voice 29 and come forth—those who have done good, to the resurrection of life, and those who have done evil, to the resurrection of condemnation. 30 I can of Myself do nothing. As I hear, I judge; and My judgment is righteous, because I do not seek My own will but the will of the Father who sent Me.
Hebrews 9
27 And as it is appointed for men to die once, but after this the judgment,
28 so Christ was offered once to bear the sins of many. To those who eagerly wait for Him He will appear a second time, apart from sin, for salvation.
1 Peter 1
1 Peter, an apostle of Jesus Christ,
To God’s elect, exiles scattered throughout the provinces of Pontus, Galatia, Cappadocia, Asia and Bithynia, 2 who have been chosen according to the foreknowledge of God the Father, through the sanctifying work of the Spirit, to be obedient to Jesus Christ and sprinkled with his blood:
Grace and peace be yours in abundance.
Praise to God for a Living Hope
3 Praise be to the God and Father of our Lord Jesus Christ! In his great mercy he has given us new birth into a living hope through the resurrection of Jesus Christ from the dead, 4 and into an inheritance that can never perish, spoil or fade. This inheritance is kept in heaven for you, 5 who through faith are shielded by God’s power until the coming of the salvation that is ready to be revealed in the last time. 6 In all this you greatly rejoice, though now for a little while you may have had to suffer grief in all kinds of trials. 7 These have come so that the proven genuineness of your faith—of greater worth than gold, which perishes even though refined by fire—may result in praise, glory and honor when Jesus Christ is revealed. 8 Though you have not seen him, you love him; and even though you do not see him now, you believe in him and are filled with an inexpressible and glorious joy, 9 for you are receiving the end result of your faith, the salvation of your souls.
Hebrews 3
1 Therefore, holy brothers and sisters, who share in the heavenly calling, fix your thoughts on Jesus, whom we acknowledge as our apostle and high priest. 2 He was faithful to the one who appointed him, just as Moses was faithful in all God’s house. 3 Jesus has been found worthy of greater honor than Moses, just as the builder of a house has greater honor than the house itself. 4 For every house is built by someone, but God is the builder of everything. 5 “Moses was faithful as a servant in all God’s house,”[
a] bearing witness to what would be spoken by God in the future. 6 But Christ is faithful as the Son over God’s house. And we are his house, if indeed we hold firmly to our confidence and the hope in which we glory.
Warning Against Unbelief
7 So, as the Holy Spirit says:
“Today, if you hear his voice,
8 do not harden your hearts
as you did in the rebellion,
during the time of testing in the wilderness,
9 where your ancestors tested and tried me,
though for forty years they saw what I did.
10 That is why I was angry with that generation;
I said, ‘Their hearts are always going astray,
and they have not known my ways.’
11 So I declared on oath in my anger,
‘They shall never enter my rest.’ ”[
b]
12 See to it, brothers and sisters, that none of you has a sinful, unbelieving heart that turns away from the living God. 13 But encourage one another daily, as long as it is called “Today,” so that none of you may be hardened by sin’s deceitfulness. 14 We have come to share in Christ, if indeed we hold our original conviction firmly to the very end. 15 As has just been said:
“Today, if you hear his voice,
do not harden your hearts
as you did in the rebellion.”[c]
16 Who were they who heard and rebelled? Were they not all those Moses led out of Egypt? 17 And with whom was he angry for forty years? Was it not with those who sinned, whose bodies perished in the wilderness? 18 And to whom did God swear that they would never enter his rest if not to those who disobeyed? 19 So we see that they were not able to enter, because of their unbelief.