I can't imagine where you ever came up with the idea of anyone being 'placed' into Christ. Jesus took my Place.
Lets start here.
Jesus is the Church. It's a spiritual body. Jesus always existed, thus the Church always existed, BUT, we call Pentecost the birth of the Church because that the first believers placed into that spiritual Body, the one True Church, Jesus. This is why it's called "in Christ" in Scripture. The baptism with the Holy spirit is just that. The placing into with the holy spirit. That placing into is not the holy Spirit being placed into us by Jesus, though He is, as a result of faith, but that placing into is us being placed into Christ as a result of that indwelling. Being in Him, we receive our justification, and being born again. Baptism means placing into.
Eph. 1:22-23 And He put all things under His feet, and gave Him to be head over all things to the church, which is His body, the fullness of Him who fills all in all.
Eph. 5:23 For the husband is head of the wife, as also Christ is head of the church; and He is the Savior of the body.
Col. 1:18 And He is the head of the body, the church, who is the beginning, the firstborn from the dead, that in all things He may have the preeminence.
These are all speaking of the Spirit baptism. that is, receiving the Holy Spirit, from Jesus, as a result of faith. This places us "in Christ, the Body the Church.
1 Cor. 12:12-14 For as the body is one and has many members, but all the members of that one body, being many, are one body, so also is Christ. For by one Spirit we were all baptized (placed into) into one body--whether Jews or Greeks, whether slaves or free--and have all been made to drink into one Spirit. For in fact the body is not one member but many.
1 Peter 3:21 There is also an antitype which now saves us--baptism (not the removal of the filth of the flesh, but the answer of a good conscience toward God), through the resurrection of Jesus Christ,
Col. 2:10-14 **In Him** you were also circumcised with the circumcision made without hands, by putting off the body of the sins of the flesh, by the circumcision of Christ, buried with Him in baptism, in which you also were raised with Him through faith in the working of God, who raised Him from the dead. And you, being dead in your trespasses and the uncircumcision of your flesh, He has made alive together with Him, having forgiven you all trespasses, having wiped out the handwriting of requirements that was against us, which was contrary to us. And He has taken it out of the way, having nailed it to the cross.
Romans 6:3-11 Or do you not know that as many of us as were baptized into Christ Jesus were baptized into His death? Therefore we were buried with Him through baptism into death, that just as Christ was raised from the dead by the glory of the Father, even so we also should walk in newness of life. For if we have been united together in the likeness of His death, certainly we also shall be in the likeness of His resurrection,
knowing this, that our old man was crucified with Him, that the body of sin might be done away with, that we should no longer be slaves of sin. For he who has died has been freed from sin. Now if we died with Christ, we believe that we shall also live with Him, knowing that Christ, having been raised from the dead, dies no more. Death no longer has dominion over Him. For the death that He died, He died to sin once for all; but the life that He lives, He lives to God. Likewise you also, reckon yourselves to be dead indeed to sin, but alive to God in Christ Jesus our Lord.
Gal. 3:26-29 For you are all sons of God through faith in Christ Jesus. For as many of you as were baptized into Christ have put on Christ. There is neither Jew nor Greek, there is neither slave nor free, there is neither male nor female; for you are all one in Christ Jesus. And if you are Christ's, then you are Abraham's seed, and heirs according to the promise.
It's the indwelling that places us in Christ. This indwelling had to wait for the giving of the Holy Spirit. The giving of the Holy Spirit had to wait for the death, resurrection, and ascension of Jesus. Promises don't cleanse Temples. Blood does.
Matthew 16:16-18 Simon Peter answered and said,
"You are the Christ, the Son of the living God." Jesus answered and said to him, "Blessed are you, Simon Bar-Jonah, for flesh and blood has not revealed this to you, but My Father who is in heaven. And I also say to you that you are Peter, and
on this rock I will build My church, and the gates of Hades shall not prevail against it.
The rock is the Gospel, Jesus.
2 Corinthians 5:17-19 Therefore, if anyone is **in Christ** he is a new creation; old things have passed away; behold, all things have become new. Now all things are of God, who has reconciled us to Himself through Jesus Christ, and has given us the ministry of reconciliation, that is, that God was in Christ reconciling the world to Himself, not imputing their trespasses to them, and has committed to us the word of reconciliation.
Dave