And that's the problem - she knows no Oralian personally. They both were fed with propaganda and if Brenok knew who those people were from the beginning, he probably wouldn't go with them. But he didn't. And he could experience first hand that what he was told was simply a lie. At least in regard of this particular group.
She doesn't know it. He told her nothing about the meetings, except that he goes there and will keep going. So she still believes the propaganda, which makes it even harder for her, as she can't understand why
he wants to go there.
He went with them the first time, because he was curious. They were so mysterious it caught his imagination. And he keeps going, because [wait for next chapter ]
In a Cardassian library
or in a Cardassian gallery
"Reagan, it appears, is really only an ardent unionist if the unions in question are in Poland" - Stephen King, Skeleton Crew