Does the Church teach that mercy is appropriate in every situation for every person? No, that is not what she believes.
You said mercy should be offered unconditionally. As I pointed out, this is incorrect.
If you forgive anyone’s sins, their sins are forgiven; if you do not forgive them, they are not forgiven.” (Jn 20:23)
If we are to forgive everywhere, every time then where is the sense in the
“if you do not forgive…” clause? In fact forgiveness is not unconditional and automatic as Aquinas shows when he presents - and then rejects - that argument…
OBJ 2: Further, Our Lord commanded Peter (Mt. 18:22) to forgive his offending brother “not” only “till seven times, but till seventy times seven times,” which Jerome expounds as meaning that “a man should be forgiven, as often as he has sinned.” Therefore he ought to be received by the Church as often as he has sinned by falling back into heresy.
- Reply OBJ 2: Our Lord was speaking to Peter of sins committed against oneself, for one should always forgive such offenses and spare our brother when he repents. These words are not to be applied to sins committed against one’s neighbor or against God, for** it is not left to our discretion to forgive such offenses***, as Jerome says on Mt. 18:15, “If thy brother shall offend against thee.” Yet even in this matter the law prescribes limits according as God’s honor or our neighbor’s good demands. (ST I/I 11,4)
I have said several times that there are always exceptions to the general rule that execution is the proper punishment for murder; the fact that Cain was such an exception hardly challenges this statement, and if you think this episode is significant then show where the Church references it when discussing capital punishment.
Ender