So even though the Jews who believed had eternal life they couldn't enter the kingdom?
As far as baptism goes, before anyone could be baptized with water theyhad to first believe, as witnessed by the following exchange between Philip and the eunuch:
"And as they went on their way, they came unto a certain water: and the eunuch said, See, here is water; what doth hinder me to be baptized? And Philip said, If thou believest with all thine heart, thou mayest. And he answered and said, I believe that Jesus Christ is the Son of God" (Acts 8:36-37).
Before the eunuch was baptized with water he was already "born of God" because he believed that Jesus is the Christ, the Son of God:
"Whosoever believeth that Jesus is the Christ is born of God..For whatsoever is born of God overcometh the world: and this is the victory that overcometh the world, even our faith. Who is he that overcometh the world, but he that believeth that Jesus is the Son of God?" (1 Jn.5:1,4-5).
There can be no doubt that the eunuch received eternal life and was "born of God" before he was baptized with water so we can know that being baptized with water does not contribute in any way to anyone being saved.
Here is what is said about law keeping in regard to salvation:
"Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin" (Ro.3:20).
Law keeping never contributed to anyone's salvation in any way, shape or form.
Despite this you say that they had to obey the law in order to enter the kingdom.
What the Lord Jesus said to the Jews who lived under the law in the following verses is either true or it is false:
"Verily, verily, I say unto you, He that believeth on me hath eternal life" (Jn.6:47).
"It is the spirit that quickeneth; the flesh profiteth nothing: the words that I speak unto you, they are spirit, and they are life" (Jn.6:63).
I say that what He said is "true," that it only took faith to receive eternal life and to be born of God, "born again." And those who are born again will enter the kingdom.