As I said above, why do you assume these students are not here legally?  There are five students individually mentioned in the article.  One is a citizen, one is clearly identified as a refugee here on a resettlement program.  For at least two of the remaining, refugee is a far more logical assumption to make.  There's no indication the final student is here improperly.

The standard line from the right is that they're not racist and only opposed to immigrants who break the law.  But the knee-jerk assumption to a story like this, along with the desperate need to label these kids as criminals reveals the truth.  It's not some noble dedication to the rule of law, it's just a dislike of people who's skin is a few shades too dark for your preference.