Dear Barry,
Slander is a term used when someone speaks a falsehood (lie) about someone else. From what I’ve seen of the “video” and other statements about Mohammad, the parts Islamofacists find offensive are the truth, ie, Mohammad is a pedophile, wife-beater, et al. He’s also a false prophet.
The future doesn’t not belong to Islam, for them the future is the past.
Don’t forget “murdering thief”.