Has what to do with the individual?
At the bottom, the great distinction between true forms of government is that of the individual vs the collective. Of the former, think “Constitutionalist Republic,” of the latter, think “socialism.”
Likewise the issue at hand here. Christ died to save individuals, individuals who seek, and love, truth. Common among Protestants. This, as opposed to the kind of one world syncretism that Romanists promote.