I can easily see reasons to make either of the choices. Consider that helping the Rose or the Golden Hand is not a show of allegiance, but strictly support for the common cause shared with each on the immediate term.
Helping the Vind, as one might expect, hardly requires justification - They are trusted allies who could use assistance with one of the things we do best: Holding the line against overwhelming hostile forces.
The Rose may work for an ideal we cannot reconcile with, but letting our differences and grudges make our decisions for us could cost innocent lives. We can trust the Vind to hold the line, but the Rose? A large amount of their forces are abroad. They will be spread thin until reinforced, likely rendering them less effective - Especially if more duplicitous members continue taking the mayhem as a chance to further their ambitions. This may be the worst time to pay fanaticism unto fanaticism.
And the Golden Hand... Earnest as they seem, relying on them is a matter of strict, urgent necessity. Trust is an entirely different thing - Ultimately, they are envoys of a hostile authority. One with morals we would consider peculiar at best, and that has strictly set out to make a show of force -- But in character, we don't know that. And their actions constitute an act of war regardless, having rendered them our enemy by virtue of harming innocents. If hostilities may resume in any way, can we trust them to remain unsupervised when bringing the portals back under Magesterium control?