So there's no proof at all that the class is filled with illegals? From what she said this is all a guess? WTF? They're just guessing?

Maybe they should just focus on the areas like employment where they are required to validate citizenship but where we all know employers work around which enables them to be here illegally in the first place. They should be exposing the businesses that enable them if that's what they're worried about. For the most part, they wouldn't be here to attend the free class without that help.
And for those who think illegals play a needed role, which I don't, this shouldn't be a problem.
