Question:
Were the Jews in Jesus’ day like those referred to in Hebrews 6:4-6?

Answer:
 
We are told in Hebrews 6:4-6: “For it is impossible for those who were once enlightened, and have tasted of the heavenly gift, and were made partakers of the Holy Ghost, and have tasted the good word of God, and the powers of the world to come, if they shall fall away, to renew them again unto repentance; seeing they crucify to themselves the Son of God afresh, and put him to an open shame.”
This possibly was not exactly what the Lord was referring to in John 8:24: “I said therefore unto you, that ye shall die in your sins: for if ye believe not that I am He, ye shall die in your sins.” Because the Jews He was speaking to may not have heard the truth, so they could not have turned away from it. In the above Scripture is what is known as an apostate—someone who was enlightened of the way to heaven, but refused it and turned purposely away from Christ. In Hebrews 10:26-29 we have the same group of people, and the Spirit of God in Hebrews is testing the Jewish professors that went along with Christianity.