"This doesn't change the point I am making. In fact, I even said "You may disagree with the usefulness of capital punishment, or even find it immoral -- but you really shouldn't have trouble understanding how one might make a distinction". You obviously understand my distinction. You are merely adding another issue that still doesn't alter the logic of my point -- that capital punishment can make a mistake."

I worded this wrong.

what I was trying to say is:

"This doesn't change the point I am making. In fact, I even said "You may disagree with the usefulness of capital punishment, or even find it immoral -- but you really shouldn't have trouble understanding how one might make a distinction". You obviously understand my distinction. You are merely adding another issue -- that capital punishment can make a mistake." That still doesn't alter the logic of my point.