The Blessings of Abraham applies to both jews and gentiles. Every jew and Every Gentile Christ died for, it redeemed them from the curse of the Law, and each one of them will have the blessing of Abraham, the Spirit come on them, through Faith/Christ.
Christ pours out the Spirit on them He died and redeemed Titus 3:5-7
5 Not by works of righteousness which we have done, but according to his mercy he saved us, by the washing of regeneration, and renewing of the Holy Ghost;
6 Which he shed on us abundantly through Jesus Christ our Saviour;
7 That being justified by his grace, we should be made heirs according to the hope of eternal life.
See this proves Gal 3:13-14
So anybody who never receives the Spirit of regeneration from the Saviour Jesus Christ, Then He never died for them and redeemed them. They have no part in the Blessings of Abraham !