To whom was the author of Hebrews writing his letter? Was it to believers or to all humanity?That scripture is telling us that Jesus was born of flesh and blood, as a Jew, so that He could die, defeat death, and free men from the same. Then we also see in another scripture that the Gospel was sent to the Gentiles. Matter of faxt, Jesus Himself saved Gentiles during His ministry. So I don't know what your point is but back up just four(4) verses above and you will find this.......
Hebrews 2: 9 "But we see Jesus, who was made a little lower than the angels for the suffering of death, crowned with glory and honour; that he by the grace of God should taste death for every man.
You struggle with the English word "all" and demand that it is addressing all humanity. The context, however, clearly refers to those whom the author is addressing. Thus...every man is every one whom God has elected.
If it was all humanity then all humanity would be saved. No rejection by any human would thwart the sacrifice Jesus gave for all humanity. If human rejection could prevail over God's work, then humans would be greater than God.
Do you see the horrible error in which you have fallen?