Aquinas reversed Augustine’s dismissal of enemy-neighbor distinctions.

Evidence

Thus, the distinction between “interior love” and “outward marks and demonstrations” (25, art. 9) is renewed as well, and the commensurability between inside and outside is reaffirmed. The commandment to love one’s enemies is all but dismissed, recast as a call to uphold hierarchical distinctions (“but there are other [outward signs] which we reserve for certain people, and which it is not necessary for salvation that we display towards our enemies,” ibid.). Aquinas thus turns Augustine on his head and restores differences that had been all but dismissed, abstracted. — Gil Anidjar, The Jew, the Arab, 193