Some equality is good and should be fought for: equality before the law, and equal access to the Gospel. Some equality is impossible and is like chasing rainbows: equality of outcome for all, equal pay for all people, equal education for all aptitudes, equal roles for different sexes, ages, and abilities.
When God made humankind, He made them male and female, both equally in His image (Genesis 1:26-27). According to Peter, this makes men and women co-heirs of the grace of life (1 Peter 3:7). He chose to do so in a staggered fashion, however, creating the male first, followed by the female. In so doing, God created and exemplified an order: the man would be the spiritual leader (1 Timothy 2:12-13).
The Fall introduced depravity into the male-female relationship (Gen. 3:16), men dominating women through sheer strength, and women desiring to usurp men’s role of leadership. When in Christ, the abuses and enmity between the sexes can be erased, with both finding their fullest identity in Him (Gal. 3:28). By the grace of Christ, husbands can again be chivalrous, loving leaders, and women can be strong, supportive companions (Ephesians 5:22-33).
All ethnicities are ultimately one race: the human race (Acts 17:26). God allowed and even separated different nations as an act of simultaneous judgement and mercy (Gen. 11:6-9; Acts 17:26-27). The development of these different ethnic groupings both retarded the depravity and rebellion of the human race, and allowed the common grace of God to work separately in each (Acts 14:16-17; 17:27). To the degree that each ethnicity rebelled against the light given to them explains the relative distance of the resulting cultures from biblical norms and truths. Some were closer in morals and practices to biblical ideals, some were much further away (Rom. 1:18-32). Ethnicities that were exposed to the Gospel and responded positively to it had the privilege of shaping their norms and practices around revealed truth.
In Christ, ethnic hatred, pride, and partiality is a thing of the past (Gal. 3:28; Col. 3:11; Jas. 2:1-10). Though Israel retains its place as a chosen ethnicity for God’s own purposes (Rom. 9:5-6; 11:1-6), believers now partake of a new, shared identity as one new humanity in Christ (Eph. 2:11-22). Just as male and female difference do not disappear in Christ, nor do ethnic idiosyncrasies and traits, which even Paul noted about the Cretans (Tis. 1:12-13). The point is, these will either be transformed by Christ, or become part of the glorious variety that makes up the redeemed (Rev. 5:9). Believers can no longer use ethnic differences as point of division or separation within the body of Christ.