Christians, of all people, should know that evil is held in place not just by the flesh (the sinful self), or even the devil (and associated demonic powers), but also by the world: the structures and systems of human power that perpetuate injustice, idolatry and immorality. It seems clear to me, for instance, that contemporary Britain is not just comprised of individual men and women who are idolatrous, or sexually immoral; our systems, structures and institutions promote idolatry and sexual immorality, in a way that is often tangential to or independent of deliberate human agency. The same is true of injustices, including racial ones. Christians are not saying this because we have been influenced by Marx. Marxists are saying it because they have been influenced by Christ.
More in this quick primer on institutional racism, unconscious bias, legacy of historical injustices, racialized assumptions, and intentional racism.