Not in the SCOTUS decision, it isn’t.
https://www.supremecourt.gov/opinions/20pdf/20-255_g3bi.pdf
“Hate speech” is actually a pretty nebulous expression in the law, appealing to emotions rather than facts.
The Court . . . identifies this case as an “example” and “leav[es] for future cases” the job of developing this new common-law doctrine. Ante, at 7–8. But the Court’s foundation is untethered from anything stable, and courts (and schools) will almost certainly be at a loss as to what exactly the Court’s opinion today means.