Pope-o-meter interpretation

[Quickening]

If you go into the "Pope-o-Meter" rating bit and hold your mouse cursor over the HRE's rating, the mouse tooltip will tell you whether they are excommunicated or not.
EDIT: Nevermind.

In my experience people with the rating that those HRE have are not excommunicated. The Pope just hates them.

EDIT2: Sorry Im being rubbish today. My very own faction has had the "Not enough fires in hell..." thing to and was not excommunicated at the time. I believe that if a faction is excommunicated, it will specifically say so.