That it is a peaceful religion.

That most Moslems are religious fanatics and that they hate America. Another one is that they have multiple wives. Most can only support one and having two would be too much of a financial burden. Another one is that they don't recognize Jesus Christ. He is listed as being among the 7 greatest prophets of Islam, just not the son of God. http://islam.about.com/cs/jesus/f/

There are many, too many to list, but Islam equating peace must rank amongst one of the most common myths about Islam.

Good question +points One very prominent myth is that it is a false religion. HQ 9:33 declares that "It is He (God) Who hath sent His Messenger (Mohammed) with guidance and the RELIGION OF TRUTH, to proclaim it over all religion, even though the Pagans may detest (it)" You might not accept that as valid. Fair enough. Let's see what the Bible says then. Jesus himself left an instruction to move on after him in John 16:12-14 "I have yet many things to say unto you, but ye cannot bear them now. Howbeit when he, the Spirit of truth, is come, HE WILL GUIDE YOU into all truth: for he shall not SPEAK of himself; but whatsoever he shall hear, that shall HE SPEAK: and he will shew you things to come. He shall glorify me" This is the prophet foretold in the OT. See http://www.answerbag.com/a_view/3517713 The NT warns about there being "many false prophets" and even shows us how to tell which is the genuine one. It says in 1 John 4:1-3 "Every spirit that confesseth that Jesus Christ is come in the flesh is of God". Let’s then apply this test to Mohammed. Does he ackowledge or deny the coming of Jesus Christ? Well, the HQ confirms that the prophecied Messiah did come and that Jesus was that prophecied Messiah. In fact it mentions Jesus by name 500% times more than Mohammed. Here's just one example HQ 4:171 “O People of the Book! Commit no excesses in your religion: Nor say of God aught but the truth. Christ Jesus the son of Mary WAS an apostle of God, and His (God’s) Word, which He bestowed on Mary, and a spirit from Him (God): so believe in God and (all) His apostles. And say not "Trinity" desist! it will be better for you: for God is one God. Glory to Him: (it cannot be) that He has a son. To Him belong all in the heavens and all on earth. And enough is God as a Disposer of affairs.” We can see that Mohammed was no antiChrist. In fact the HQ glorifies Jesus. Mohammed clearly passes the "genuine" test with flying colours. Now the test is on us, do we move on as Jesus said we should?

That they support terrorism and want all Americans to die.