Yeah... did you say something about a long message earlier?
Nah but seriously, we as players get it written out for (what I consider to be) enjoyment and insight in characters that doesn't necessarily mean Arnoud considers these lines of thought explicitly. If you find it too painful to think that even possible, view this as nigh simultaneous subconscious thoughts swarming his mind, merging into one explicit thought of "God. Damn. It." with a twisted tangle of emotion forcing a decision he only half understands down his proverbial throat.
Also, he hates you guys for making him Prefect and knows you guys set him up in some way, he's on to you.
Seriously considered Arnoud to abstain from voting to get the no-Prefect result he wanted all along but even strange little Arnoud knows that's too much of a dick move to ever recover from within the TV time line. The political thinking and compromising has begun.