As long as Freedom of Speech remains a democratic right, anyone has the right to go in front of any school and protest using vile (prutza, etc.) language. The ACLU defending the KKK’s right to march in a predominantly Jewish suburb of Chicago in their white hoods. The courts upheld that as a right to free speech, whether we liked it or not.
There has been only one alleged physical action – the spitting. Fine the guy or give him community service or whatever the prescribed penalty for the misdemeanor of spitting is under the law. The “uproar” is entirely manafactured by the religious hating media and their enablers.