Maybe but perhaps its because I worked for a prosecutions agency. Balance of probability isn't enough for me to send someone off to an unknown but probably unpleasant fate. I want beyond reasonable doubt and that means evidence, not just Kematu's unsupported word.
So let their courts handle it? I mean if a fugitive from Wisconson hides out in Illinois and law enforcement comes looking, you don't kill them because you can't be sure they're really police officers...The Alik'r warriors are wearing the official Redguard Alik'r garb after all.
If you're really not sure, don't side with either one.
But seriously, you side with Kematu, Saadia might die. You side with Saadia, Kematu DEFINITELY dies.(As do several other Alik'r)
All that work and manpower just to turn 1 specific person into a slave sounds incredulous.
That's a weird sense of justice you have.