It just seems that people, especially in the case of Muslims,
are fiercely protective of the their Religion, Islam.
Cartoons and certain quotes would send them into street protest and
start to bay for the blood of whoever said or drew anything even
slightly offending to Islam... They seem to view critcism as an
direct attack on their faith and start to have this siege
mentality.
For other religion, such as Christianity, they seem to be more
tolerant of criticism and view it as a test of their faith. Look at
movies like Da Vinci code which actually doubts the origin of
Christianity... Wonder what would happen if an similar show about
Islam would Ignite?
Anyway, it would be best if we do not even comment on another's
faith. Believe what you want but do not criticise what others want
to believe. Applies for every religion.