The title of your thread is not only provocative but TOTALLY FALSE and misleading.
Obviously you need to study this matter properly. When the Holy Spirit was poured out upon all flesh on the day of Pentecost, that prophecy of Joel was fulfilled. And the outpouring of the Holy Spirit meant that the New Covenant was now in effect.
While the New Covenant was given to Israel, Gentile believers were definitely NOT excluded. Christ is the Mediator of the New Covenant (see the epistle to the Hebrews) and is "a Light to lighten the Gentiles". Thus Gentiles were added or grafted into the "good olive tree" of remnant Jews who believed on the Lord Jesus Christ. See Romans 11.
As to Daniel's prophecy of 70 weeks of years, that will only be fulfilled after the Second Coming of Christ. It has only been partially fulfilled. But it has no bearing on the New Covenant being in effect from the day Christ died. What did Jesus say at the Last Supper?And he took the cup, and gave thanks, and gave it to them, saying, Drink ye all of it; For this is my blood of the New Testament [Covenant], which is shed for many for the remission of sins. (Mt 26:27,28) So the day Christ shed His blood for our redemption was the day when the New Covenant or Testament went into effect.