Where's the sin?

Here's a joke I came across in the comments sections of a CMR blogpost :)

A young Irishman goes to confession one Saturday. He begins, "Bless me Father, I have sinned. Since my last confession I've taken part in the ambush of several British soldiers." He pauses, there is no response.

Feeling the priest may not have been paying attention he states, "Father, we killed five men. I personally shot two of them meself."

Still no answer. Wondering now if the priest may have fainted or otherwise been stricken by such a blunt confession, the man says in a loud voice, "FATHER, ARE YE THERE?"

From behind the screen comes a voice, "Indeed I am my son, and I'm waiting for you to stop discussing politics and get on with your confession."