Do I not destroy my enemies when I make them my friends?

There are two ways an enemy stops being an enemy. One is that you beat them; the other is that the reason for the quarrel dissolves and you find you are on the same side. Both leave you without an opponent, but only the second leaves you with a person. Winning tends to preserve the grudge inside whoever lost it, which means the fight is not really over.

Pick one person you have filed under opposition and test whether the file is still accurate. Ask them a question you actually want answered. You are not required to like them; you are only seeing whether the enmity is load-bearing.