If Christ died and atoned for the sins of everyone then everyone would be saved. Is everyone saved?
This is a common misconception by the reformed. His death did not, nor was it supposed to, save anyone. It IS the basis for who God saves, justifies, adopts as sons.
But the requirement for salvation, justification and adoption as sons is faith, not His death. If His death accomplished these things, faith would have no place.
Are you comfortable with that? I'm not.
Requirements:
For salvation:
Mark 16:16
16 " He who has believed and has been baptized shall be saved; but he who has disbelieved shall be condemned.
Luke 8:12
12 "Those beside the road are those who have heard; then the devil comes and takes away the word from their heart, so that they will not believe and be saved.
Acts 4:12
12 "And there is salvation in no one else; for there is no other name under heaven that has been given among men by which we must be saved."
Acts 11:14
14 and he will speak words to you by which you will be saved, you and all your household.'
Acts 16:31
They said, “Believe in the Lord Jesus, and you will be saved, you and your household."
Rom 10:9, 10
9 that if you confess with your mouth Jesus as Lord, and believe in your heart that God raised Him from the dead, you will be saved; 10 for with the heart a person believes, resulting in righteousness, and with the mouth he confesses, resulting in salvation.
Rom 1:16
16 For I am not ashamed of the gospel, for it is the power of God for salvation to everyone who believes, to the Jew first and also to the Greek.
Eph 2:8 For by grace you have been saved through faith; and that not of yourselves, it is the gift of God;
2 Tim 3:15
15 and that from childhood you have known the sacred writings which are able to give you the wisdom that leads to salvation through faith which is in Christ Jesus.
1 Peter 1:5
5 who are protected by the power of God through faith for a salvation ready to be revealed in the last time.
1 Peter 1:9 obtaining as the outcome of your faith the salvation of your souls.
2 Thess 2:13 But we should always give thanks to God for you, brethren beloved by the Lord, because God has chosen you from the beginning for salvation through sanctification by the Spirit and faith in the truth.
For justification:
Acts 13:39 Through Him everyone who believes is justified from everything you could not be justified from by the law of Moses.
Rom 3:22 This righteousness from God comes through faith in Jesus Christ to all who believe. There is no difference.
Rom 3:24 being justified as a gift by His grace through the redemption which is in Christ Jesus;
Rom 3:28, 30
28 For we maintain that a man is justified by faith apart from works of the Law. 30 since indeed God who will justify the circumcised by faith and the uncircumcised through faith is one.
Rom 4:5 But to the one who does not work, but believes in Him who justifies the ungodly, his faith is credited as righteousness,
Rom 5:1 Therefore, having been justified by faith, we have peace with God through our Lord Jesus Christ,
Gal 2:16
16 nevertheless knowing that a man is not justified by the works of the Law but through faith in Christ Jesus, even we have believed in Christ Jesus, so that we may be justified by faith in Christ and not by the works of the Law; since by the works of the Law no flesh will be justified.
Gal 3:8 The Scripture, foreseeing that God would justify the Gentiles by faith, preached the gospel beforehand to Abraham, saying, "ALL THE NATIONS WILL BE BLESSED IN YOU."
Gal 3:24 Therefore the Law has become our tutor to lead us to Christ, so that we may be justified by faith.
1 Cor 6:11 Such were some of you; but you were washed, but you were sanctified, but you were justified in the name of the Lord Jesus Christ and in the Spirit of our God.
For adoption as sons:
John 1:12 But as many as received Him, to them He gave the right to become children of God, even to those who believe in His name,
Gal 3:26 For you are all sons of God through faith in Christ Jesus.
As well, eternal life is also dependent upon faith:
John 3:15-16
15 so that whoever believes will in Him have eternal life. 16 "For God so loved the world, that He gave His only begotten Son, that whoever believes in Him shall not perish, but have eternal life.
John 3:36
36 "He who believes in the Son has eternal life; but he who does not obey the Son will not see life, but the wrath of God abides on him."
John 5:24
24 "Truly, truly, I say to you, he who hears My word, and believes Him who sent Me, has eternal life, and does not come into judgment, but has passed out of death into life.
John 6:40
40 "For this is the will of My Father, that everyone who beholds the Son and believes in Him will have eternal life, and I Myself will raise him up on the last day."
John 6:47 "Truly, truly, I say to you, he who believes has eternal life.
Rom 6:23 For the wages of sin is death, but the free gift of God is eternal life in Christ Jesus our Lord
1 Tim 1:16 Yet for this reason I found mercy, so that in me as the foremost, Jesus Christ might demonstrate His perfect patience as an example for those who would believe in Him for eternal life.
Gal 3:22 But the Scripture has shut up everyone under sin, so that the promise by faith in Jesus Christ might be given to those who believe.
1 John 5:13
These things I have written to you who believe in the name of the Son of God, so that you may know that you have eternal life.
None of these verses has any meaning if Christ's death accomplished salvation, justification, or adoption as sons.