Members of the group, Reclaiming Missouri for Christ, rejected the word "protest" as a description for their plans Friday. They called it Christian outreach. They planned to hand out literature about Muslims who converted to Christianity. Organizers said the gathering would be peaceful.
Many parents were worried the gathering would turn violent. So, they kept their kids out of classes. Ameen Ahmad did not get the letter from the principal. He and his five-year-old son arrived to an empty building. But, the father said he was not worried.
"If they want to say something, they'll say it in a very peaceful manner. So, I'm not concerned in that sense that somebody will harm my kid or somebody will harm me."
Now, some might wonder why Al-Salam -- of all the Muslim schools in the area -- would close because of this gathering. On the other side of the school is the Daar-ul-Islam Mosque, home to the Islamic Foundation of Greater St. Louis. Also, Reclaiming Missouri planned to pass their literature out during midday prayers at the mosque.
St. Louis County Police planned to send an officer to make sure everyone was safe.