Muhamud cartoon time!

Phoenix (CNN)Jon Ritzheimer is a former Marine, and he has no middle ground when it comes to Islam.

His T-shirt pretty much says it all: "F--- Islam."

Ritzheimer is the organizer of Friday's "Freedom of Speech Rally" outside the Islamic Community Center in Phoenix.

It's the mosque that Elton Simpson and Nadir Soofi attended for a time. They're the men who drove from Arizona to a Dallas suburb to shoot up a Prophet Mohammed cartoon contest there. Both were killed by police early this month.

Many Muslims consider demeaning depictions of Mohammed to be blasphemous and banned by Islamic law.