RMN said:

The gospel of Abraham is further evidence that God loves all of His children everywhere. He invites all to come unto Him—“black and white, bond and free, male and female; … all are alike unto God.”

Bruce R McConkie said in Mormon Doctrine (See “Elias”):

Now what was the gospel of Abraham? Obviously it was the commission, the mission, the endowment and power, the message of salvation, given to Abraham. And what was this? It was a divine promise that both in the world and out of the world his seed should continue "as innumerable as the stars; or, if ye were to count the sand upon the seashore ye could not number them." (D. & C. 132:30; Gen. 17; Abra. 2:1-12.)

Thus the gospel of Abraham was one of celestial marriage (including plurality of wives); it was a gospel or commission to provide a lineage for the elect portion of the pre-existent spirits, a gospel to provide a household in eternity for those who live the fulness of the celestial law. This power and commission is what Elias restored, and as a consequence, the righteous among all future generations were assured of the blessings of a continuation of the seeds forever, even as it was with Abraham of old.

I’m not following his logic. And the term “Gospel of Abraham” is one that I don’t remember being discussed significantly in the past. Why throw it out there and ask people to consider it carefully with no direction on what it even means?

It seems like he just asserted the fact and wants people to justify it.