well, he did a kill before he was teamkilled. The guy he killed was an occitan. The guy who teamkilled him was an occitan. Read the description of what happened, I guss thats worth a ban.
I do the exact same thing all the time. It's a silly little thing, just to be funny. You didn't lose the round because of it. You didn't really lose anything, aside from 1 death added to a K:D ratio that only you can see. If that is extraordinarily important to you...I'm sorry.
I think that the rules are applied a bit differently in EU. Certainly the overall atmosphere is different between servers. Basically, if you're absolutely guaranteed to win a round (no enemy superstar player left, just some new shielder or something), a bit of teamkilling is overlooked. Especially if there is any comedy involved, like this very thing was intended to be.
It's just a couple of dudes sitting in teamspeak, having fun and saying "ah, that fucker got me, go get revenge :DDD".
Except for they're speaking French, and likely saying pretty hilarious things.
Not to mention I'm basically entirely to blame for this, since our two groups integrated, the Occitan guys seem to have picked up the Frisian affinity for intentional comedic teamkilling shared amongst teammates and the server at large.
I'm proud of them.
dey din du nuffin, dey good boys go to church every sunday etc