because the nicey nice vision of everyone just getting along in a multicultural society isn't the reality.
what actually happens is that people who exercise their freedoms, such as the danish cartoonist and the folks at the french magazine, or salman rushdie in england, end up either dead or in hiding.
there's a cost to living with islam. pretending it is otherwise is blindness.
moslems can't live with one another in peace. what hope for a multicultural society that includes the freedom to make fun of relgion?
if i were bill maher or richard dawkins or sam harris, i'd be worried.
http://news.sky.com/story/1403662/gunmen-hunted-after-12-killed-at-paris-magazine