Not false
After 7 years (the last prophetic week of Daniel's 70 week prophecy) of ministering TO THE LOST SHEEP OF THE HOUSE OF ISRAEL, and their final rejection of Christ, in the stoning of Stephen, their fate, AS A CHOSEN PEOPLE, was sealed. They are done, as a group. It's over.
God gave them EXACTLY 490 years of probation. The Stoning of Stephen was the very last straw. They rejected Christ and his prophet.
However, individually, salvation can still be obtained through faith in Christ, just like anyone else.
"Lay not this sin. Literally, “do not reckon to them this sin.” Stephen could do little with respect to his persecutors’ past sins, but he had a personal right to request forgiveness for their present transgression. In pleading for them he revealed how fully he had acquired the forgiving spirit that had characterized his Master (cf. Luke 23:34)".
SDA Bible Commentary
'Tis a worthy quest; for...
Matthew 6:15 NIVBut if you do not forgive others their sins, your Father will not forgive your sins.