The question on her sign just as easily could be:
"Is it OK for Muslim students to force Mexican students to comply by Halal, and not freely practice their own culture, religion, and customs, and make them abstain from eating chicharrones in school,
or a shredded pork enchilada or burrito, on for school lunch, if Mexican students are present?"
Note to meme sign holder. In the USA, your rights end where another students begins.