I might've been playing DoW 2 Retribution again
You forgot to add "an' give us your hats!" in that case.
On a more serious note, Nordera aren't as stupid/violent as warhammer orks. For one thing they don't use firearms inside their own city, so they don't blow up. Warhammer 40K Orks would never even consider not shooting, even if they'd build cities in the first place.
A Nordera alliance with the LSF/CSA is unlikely, considering the Hertak failsafe.
If I remember correctly Spoon said the failsave was only installed in the ships of a few specific clans.
Edit: Yep, I did remember correctly:
It is installed on a few select clans that are deemed by the Hertak to be too unpredictable, aggressive or just too stupid.
It is likely that after this event most Nordera clans will be double checking their own ships though.