Here's a real question to Muslims?

Why is it so many of you find the time to run out in the streets to protest against anything that questions Muhammad negitivily, yet don't do anything about anything that makes fun of Jesus. Does Islam no believe in Christianity as the religion that precedes Islam? Is Jesus not the most quoted prophet in the Qu'ran? In fact why don't Muslims refer to Jesus, as "The Prophet Jesus Christ, Peace be upon him" as they do for Muhammad?