My plan is to take a 6am train from Asilah to Cassablanca airport this sunday the 15th. There is an anti government protest scheduled to happen that morning in Rabat at the parliament building at 9am. The scheduled arrival at airport is noon. My flight is at 430pm. Will my train travel be disrupted?

I seriously doubt the government would allow a disruption. But if you're worried go tonight and spend the night at the Ibis Casa Voyageurs hotel (right at the station where you change trains for the airport) hotel.