Yes, there are those with that view. There are also Protestants right here in America who believe the Wholly Catholic Church is the root of all evil, and all Catholics (as well as Jews, Muslims, etc. ad nauseum) should be "purged" from the face of the earth. As you stated, these "people" are idiots whose rantings should be give the same amount of credence as the blatherings of Jerry Falwell.
At its root, Islam is about peace, and the love of God. Most devout Muslims understand this, and really haven't got time for world domination, purifying the masses, and all that frothing tommyrot that the morons spout.
Be careful not to paint with too broad a brush.