I'm sorry, but for whatever reason, it doesn't seem to be working. However, I think I understood the thrust of the question.
This does seem to be born out of a desire for vengeance, for punishing these schoolgirls. You must understand that girls as young as 10 were seen protesting in large numbers against this regime, and this regime's modus operandi has been to target precisely the people who are standing up against them.
For example, the working class rose up against the regime and two of the people this regime executed very publicly were working-class young men to send a message to the working class to go back home and stop protesting. These chemical attacks against schoolgirls also seem to be in that vein. They seem to be designed to send a message to these girls that if they come out again, if they push back against the government, if they join these protests, they will be punished, and the regime is going to target the very thing that empowers them, which is their education.