The moment those guys lost the ability to use magic is actually when they exiled her, not when Ruri made her outburst.
From the POV of a spy nearby who can see the spirits, he was sweating profusely at how STUPID the humans (who can't see spirits) are with how they treat Ruri like that (he was watching the treason 'trial', and the spirits were staring daggers at those guys)
In fact the spirits were going to completely destroying the country outright, but the spy guy convinced them not to.
Saying that among those people here there's the people summoned with Ruri so they might be her friends and if those people die, Ruri will probably be sad.
(his real reason is that the citizens shouldn't suffer because of a stupid king's decision)
That said, just like how Ruri convinced them to stop their strikes, if she personally ask them to do it, they will.