When the Freedom Riders approach them, their appetite is vulturous
This line is absolutely brilliant.
Obviously this would grant some vulturous (read: predatory) attitudes towards the Riders from Southerners, whom at the time still believed in the heavy separation of whites and blacks.
Secondly, The Freedom Writers is a 2007 film starring Hilary Swank, in which she plays a teacher who must help a struggling high school class reach graduation while they deal with their terrible home lives (wonder if any of her kids ever came in smelling like dank?). At first she is heavily resented by the kids, which is where the vulturous attitude comes in to play.
And thirdly, when his thoughts approach these secrets he is holding within, he has to fight the urge to pen them down freely as these secrets don’t want to be shown to the world. In a metaphorical sense, the devils mentioned in the previous line attack his urge to profess himself in a song, making them vulturous to his free right to write down his personal feelings.
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