Careful. Once again, I’ve never said that there are “two classes of human beings.” Human being is a modern English language term.
Also, even if all are classified as “humanity”, classification division and categorization is hardly foreign to the Bible. A few chapters after the Genesis creation account we have the story of the continuation of God’s choice to use the lineage of a particular person and people. (Adam leads to Abraham, genealogically and thematically.) Yes, it is hard to read the Bible without noticing the distinction between Jew and Gentile.
Is that some kind of “racism”? Considering that a Gentile could choose to become a Jew and considering how the entire sweeping story of the Bible culminates in an end to “Jewish primacy” in God’s eternal plan, it would be anachronistic to apply that label to God’s choice to use one particular lineage and people to bless all lineages and peoples.