Are we born spiritually alive or spiritually dead? What is your Scriptural justification for that?
The strongest claim I can find for being born spiritually dead is what Jesus says to Nicodemus: "Verily, Verily, I say unto thee, except a man be born of water and of the Spirit, he cannot enter into the kingdom of God. That which is born of the flesh is flesh; and that which is born of the Spirit is spirit. Marvel not that I said unto you that you must be born again." (John 3:5-6)..............
What Jesus said to Nicodemus in this passage is probably all we need to agree with and understand the doctrine.
The fact that Jesus chided Nicodemus for not understanding one of the most basic doctrines in the scripture should give us in the Church pause - because we have the Spirit of God in a way Nicodemus didn't and are doubly without excuse.
On the day that Adan sinned - he died. God said so. He obviously did not die physically. He must therefore have died spiritually and we see the result in his dead condition shortly after the sinning took place.
Nicodemus, as a major teacher of Israel, should have understood that men are in need of a new birth. As Jesus might well have said, "Holy cow Nic - this is rather basic stuff for a teacher of the scriptures isn't it?"
We are in Adam as we are born with a sinful nature and therefore we are spiritually dead - Duhh!
I suppose one could argue that we "become" spiritually dead when we actually sin and not before (based on Romans 7:9). That would allow for infants going to Heaven without actually hearing and "believing" the gospel - even though, salvation being by grace, God can and does regenerate anyone He pleases, infant or otherwise.
In like manner - we should consider what God considers "dead". If He means by the term, a separation from Himself - one could argue that even born again Christian "die" when they sin, and be correct in so doing. So long as we don't, in affirming that concept, deny the eternal sealing and security of those born again and thereby enter into believing and teaching a gospel of works - speaking of spiritual death in that way is probably correct.
But, putting those things aside, the effect for anyone who can read this discussion is the same since we all sin pretty early on.
Jesus was apparently appalled that a major teacher of His people would be so ignorant of this most basic of concepts.
How much more is He appalled that some of those with His Spirit to guide them into all truth and who stand as teachers of His people in this age of grace should be equally as ignorant as was Nicodemus.
Jesus' likening the manner of the new birth to natural physical birth should also give us enough information to understand salvation by grace through faith.
One who has been generated in secret physically by His earthly father- in due time enters into this world and begins his physical life in the kingdom of this world.
In like manner one who has been generated spiritually by His Heavenly Father in secret by grace, enters into the Kingdom of God in due time when He partakes of the Word of God - as we are told by Peter.
This isn't really spiritual rocket science.
The only reason some argue against the simple concepts spelled out by Jesus for us is that they rebel against the concept of salvation by grace which is the natural consequential doctrine for us to believe based on the teaching of the Lord in this passage.