The movie for which she acted was NOT "released"; instead, the bigots in charge re-edited it to put in racist and anti-muslim dialog WHICH THE ORIGINAL ACTORS HADN'T SPOKEN.
I don't think copyright law is necessarily the proper vehicle for the actors' efforts to take down the YouTube video, but they should have SOME recourse. This isn't some fangirl making a music video of their favorite actors, it's setting up the actors to look like they support hate-speech, and as others have pointed out, it's putting their lives at risk.
If someone re-dubbed video they'd taken of, say, an interview with Brad Pitt or Harrison Ford, and made them appear to be spouting neo-Nazi slogans, this would NOT be allowable use, even if the person doing the dubbing owned all the rights to the original video. Difference is, if someone did this to a "big name" star, YouTube wouldn't dare fight to keep the video up. Just because the actors involved in this thing are struggling unknowns and probably not very good doesn't mean it's LEGAL to do to them something you wouldn't do to someone with "industry clout".
"...it's crap like this that makes me want to go out and pirate their works just to piss them off."
Hey, they're self-publishing on Amazon (i.e.: they couldn't get contracts with real publishers) and are not only ignorant of their own contracts but also have less reading comprehension ability than most of us here had in grade-school. Do you REALLY think their books would be worth the effort?