I find it ironic, actually more like laughable, that you speak of " teaching the children that racism and sexism are wrong."
Insulting the traditional clothes (bedsheets?) and complaining that " a school full of Arabs" is counterproductive to teaching English make me think that I would not want you talking to my children about racial tolerance abd respect for differences. And please, let's not launch into the disucssion of how "objectively speaking" having Arabic-speaking kids in a school lowers the standard of English language education, because even if that is your opinion, there are more respectful ways of expressing it. The comment about "bedsheets" is simply inexcusable.

BTW, I do not have kids in Chweifat and have no experience with it whatsoever, so I am not defending it (or any other school for that matter)