A group of Christian missionaries hijacked an Arab-American festival in Dearborn, Michigan on Saturday, bearing signs criticizing Islam and carrying a pig's head mounted on a pole.

According to the Detroit Free Press, several Christian missionaries protested the Arab International Festival, shouting at attendees and holding signs which read, "Islam is a religion of blood and murder"  and  "Muhammad is a ... liar, false prophet, murderer, child molesting pervert." One missionary also carried a pig's head on a staff—an antagonistic gesture because Muslims do not eat pork.

One of the missionary groups, called the Bible Believers, has notoriously picketed Arab events in the past. The group's website—which contains lengthy diatribes against Santa Claus and Christian Rock music, among other things—has a section conveniently titled, "What So Wrong With Islam?" Among the reasons cited are a belief that Muhammad was a sinner, and that the Quran requires violence.

The annual festival, the largest such celebration of the Muslim faith in the U.S., has been targeted by Chrsitian groups for several years now. In 2010, police arrested at least six people after tensions boiled over between protesters and attendees.

Luckily for this year's attendees, the Bible Believers were not on hand for Sunday's continuation of the festivities. According to the Free Press, they're busy protesting a gay pride event in Ohio.

Here's some footage from the 2011 festival, where you can see the Bible Believers in action:

Screenshot via MartyrsNudieBar on YouTube, Creative Commons licensed